Editor.java revision 894469ce0eaa705739e885f4a1b007f73f714e01
1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.widget; 18 19import android.R; 20import android.animation.ValueAnimator; 21import android.annotation.IntDef; 22import android.annotation.NonNull; 23import android.annotation.Nullable; 24import android.app.PendingIntent; 25import android.app.PendingIntent.CanceledException; 26import android.content.ClipData; 27import android.content.ClipData.Item; 28import android.content.Context; 29import android.content.Intent; 30import android.content.UndoManager; 31import android.content.UndoOperation; 32import android.content.UndoOwner; 33import android.content.pm.PackageManager; 34import android.content.pm.ResolveInfo; 35import android.content.res.TypedArray; 36import android.graphics.Canvas; 37import android.graphics.Color; 38import android.graphics.Matrix; 39import android.graphics.Paint; 40import android.graphics.Path; 41import android.graphics.PointF; 42import android.graphics.Rect; 43import android.graphics.RectF; 44import android.graphics.drawable.ColorDrawable; 45import android.graphics.drawable.Drawable; 46import android.os.Bundle; 47import android.os.LocaleList; 48import android.os.Parcel; 49import android.os.Parcelable; 50import android.os.ParcelableParcel; 51import android.os.SystemClock; 52import android.provider.Settings; 53import android.text.DynamicLayout; 54import android.text.Editable; 55import android.text.InputFilter; 56import android.text.InputType; 57import android.text.Layout; 58import android.text.ParcelableSpan; 59import android.text.Selection; 60import android.text.SpanWatcher; 61import android.text.Spannable; 62import android.text.SpannableStringBuilder; 63import android.text.Spanned; 64import android.text.StaticLayout; 65import android.text.TextUtils; 66import android.text.method.KeyListener; 67import android.text.method.MetaKeyKeyListener; 68import android.text.method.MovementMethod; 69import android.text.method.WordIterator; 70import android.text.style.EasyEditSpan; 71import android.text.style.SuggestionRangeSpan; 72import android.text.style.SuggestionSpan; 73import android.text.style.TextAppearanceSpan; 74import android.text.style.URLSpan; 75import android.util.ArraySet; 76import android.util.DisplayMetrics; 77import android.util.Log; 78import android.util.SparseArray; 79import android.view.ActionMode; 80import android.view.ActionMode.Callback; 81import android.view.ContextMenu; 82import android.view.ContextThemeWrapper; 83import android.view.DisplayListCanvas; 84import android.view.DragAndDropPermissions; 85import android.view.DragEvent; 86import android.view.Gravity; 87import android.view.HapticFeedbackConstants; 88import android.view.InputDevice; 89import android.view.LayoutInflater; 90import android.view.Menu; 91import android.view.MenuItem; 92import android.view.MotionEvent; 93import android.view.RenderNode; 94import android.view.SubMenu; 95import android.view.View; 96import android.view.View.DragShadowBuilder; 97import android.view.View.OnClickListener; 98import android.view.ViewConfiguration; 99import android.view.ViewGroup; 100import android.view.ViewGroup.LayoutParams; 101import android.view.ViewTreeObserver; 102import android.view.WindowManager; 103import android.view.accessibility.AccessibilityNodeInfo; 104import android.view.animation.LinearInterpolator; 105import android.view.inputmethod.CorrectionInfo; 106import android.view.inputmethod.CursorAnchorInfo; 107import android.view.inputmethod.EditorInfo; 108import android.view.inputmethod.ExtractedText; 109import android.view.inputmethod.ExtractedTextRequest; 110import android.view.inputmethod.InputConnection; 111import android.view.inputmethod.InputMethodManager; 112import android.view.textclassifier.TextClassification; 113import android.view.textclassifier.TextClassificationManager; 114import android.widget.AdapterView.OnItemClickListener; 115import android.widget.TextView.Drawables; 116import android.widget.TextView.OnEditorActionListener; 117 118import com.android.internal.annotations.VisibleForTesting; 119import com.android.internal.logging.MetricsLogger; 120import com.android.internal.logging.nano.MetricsProto.MetricsEvent; 121import com.android.internal.util.ArrayUtils; 122import com.android.internal.util.GrowingArrayUtils; 123import com.android.internal.util.Preconditions; 124import com.android.internal.widget.EditableInputConnection; 125 126import java.lang.annotation.Retention; 127import java.lang.annotation.RetentionPolicy; 128import java.text.BreakIterator; 129import java.util.ArrayList; 130import java.util.Arrays; 131import java.util.Comparator; 132import java.util.HashMap; 133import java.util.List; 134import java.util.Map; 135 136/** 137 * Helper class used by TextView to handle editable text views. 138 * 139 * @hide 140 */ 141public class Editor { 142 private static final String TAG = "Editor"; 143 private static final boolean DEBUG_UNDO = false; 144 // Specifies whether to use or not the magnifier when pressing the insertion or selection 145 // handles. 146 private static final boolean FLAG_USE_MAGNIFIER = true; 147 148 static final int BLINK = 500; 149 private static final int DRAG_SHADOW_MAX_TEXT_LENGTH = 20; 150 private static final float LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS = 0.5f; 151 private static final int UNSET_X_VALUE = -1; 152 private static final int UNSET_LINE = -1; 153 // Tag used when the Editor maintains its own separate UndoManager. 154 private static final String UNDO_OWNER_TAG = "Editor"; 155 156 // Ordering constants used to place the Action Mode or context menu items in their menu. 157 private static final int MENU_ITEM_ORDER_ASSIST = 0; 158 private static final int MENU_ITEM_ORDER_UNDO = 2; 159 private static final int MENU_ITEM_ORDER_REDO = 3; 160 private static final int MENU_ITEM_ORDER_CUT = 4; 161 private static final int MENU_ITEM_ORDER_COPY = 5; 162 private static final int MENU_ITEM_ORDER_PASTE = 6; 163 private static final int MENU_ITEM_ORDER_SHARE = 7; 164 private static final int MENU_ITEM_ORDER_SELECT_ALL = 8; 165 private static final int MENU_ITEM_ORDER_REPLACE = 9; 166 private static final int MENU_ITEM_ORDER_AUTOFILL = 10; 167 private static final int MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT = 11; 168 private static final int MENU_ITEM_ORDER_SECONDARY_ASSIST_ACTIONS_START = 50; 169 private static final int MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START = 100; 170 171 @IntDef({MagnifierHandleTrigger.SELECTION_START, 172 MagnifierHandleTrigger.SELECTION_END, 173 MagnifierHandleTrigger.INSERTION}) 174 @Retention(RetentionPolicy.SOURCE) 175 private @interface MagnifierHandleTrigger { 176 int INSERTION = 0; 177 int SELECTION_START = 1; 178 int SELECTION_END = 2; 179 } 180 181 @IntDef({TextActionMode.SELECTION, TextActionMode.INSERTION, TextActionMode.TEXT_LINK}) 182 @interface TextActionMode { 183 int SELECTION = 0; 184 int INSERTION = 1; 185 int TEXT_LINK = 2; 186 } 187 188 // Each Editor manages its own undo stack. 189 private final UndoManager mUndoManager = new UndoManager(); 190 private UndoOwner mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 191 final UndoInputFilter mUndoInputFilter = new UndoInputFilter(this); 192 boolean mAllowUndo = true; 193 194 private final MetricsLogger mMetricsLogger = new MetricsLogger(); 195 196 // Cursor Controllers. 197 private InsertionPointCursorController mInsertionPointCursorController; 198 SelectionModifierCursorController mSelectionModifierCursorController; 199 // Action mode used when text is selected or when actions on an insertion cursor are triggered. 200 private ActionMode mTextActionMode; 201 private boolean mInsertionControllerEnabled; 202 private boolean mSelectionControllerEnabled; 203 204 private final boolean mHapticTextHandleEnabled; 205 206 private final MagnifierMotionAnimator mMagnifierAnimator; 207 private final Runnable mUpdateMagnifierRunnable = new Runnable() { 208 @Override 209 public void run() { 210 mMagnifierAnimator.update(); 211 } 212 }; 213 // Update the magnifier contents whenever anything in the view hierarchy is updated. 214 // Note: this only captures UI thread-visible changes, so it's a known issue that an animating 215 // VectorDrawable or Ripple animation will not trigger capture, since they're owned by 216 // RenderThread. 217 private final ViewTreeObserver.OnDrawListener mMagnifierOnDrawListener = 218 new ViewTreeObserver.OnDrawListener() { 219 @Override 220 public void onDraw() { 221 if (mMagnifierAnimator != null) { 222 // Posting the method will ensure that updating the magnifier contents will 223 // happen right after the rendering of the current frame. 224 mTextView.post(mUpdateMagnifierRunnable); 225 } 226 } 227 }; 228 229 // Used to highlight a word when it is corrected by the IME 230 private CorrectionHighlighter mCorrectionHighlighter; 231 232 InputContentType mInputContentType; 233 InputMethodState mInputMethodState; 234 235 private static class TextRenderNode { 236 // Render node has 3 recording states: 237 // 1. Recorded operations are valid. 238 // #needsRecord() returns false, but needsToBeShifted is false. 239 // 2. Recorded operations are not valid, but just the position needed to be updated. 240 // #needsRecord() returns false, but needsToBeShifted is true. 241 // 3. Recorded operations are not valid. Need to record operations. #needsRecord() returns 242 // true. 243 RenderNode renderNode; 244 boolean isDirty; 245 // Becomes true when recorded operations can be reused, but the position has to be updated. 246 boolean needsToBeShifted; 247 public TextRenderNode(String name) { 248 renderNode = RenderNode.create(name, null); 249 isDirty = true; 250 needsToBeShifted = true; 251 } 252 boolean needsRecord() { 253 return isDirty || !renderNode.isValid(); 254 } 255 } 256 private TextRenderNode[] mTextRenderNodes; 257 258 boolean mFrozenWithFocus; 259 boolean mSelectionMoved; 260 boolean mTouchFocusSelected; 261 262 KeyListener mKeyListener; 263 int mInputType = EditorInfo.TYPE_NULL; 264 265 boolean mDiscardNextActionUp; 266 boolean mIgnoreActionUpEvent; 267 268 private long mShowCursor; 269 private boolean mRenderCursorRegardlessTiming; 270 private Blink mBlink; 271 272 boolean mCursorVisible = true; 273 boolean mSelectAllOnFocus; 274 boolean mTextIsSelectable; 275 276 CharSequence mError; 277 boolean mErrorWasChanged; 278 private ErrorPopup mErrorPopup; 279 280 /** 281 * This flag is set if the TextView tries to display an error before it 282 * is attached to the window (so its position is still unknown). 283 * It causes the error to be shown later, when onAttachedToWindow() 284 * is called. 285 */ 286 private boolean mShowErrorAfterAttach; 287 288 boolean mInBatchEditControllers; 289 boolean mShowSoftInputOnFocus = true; 290 private boolean mPreserveSelection; 291 private boolean mRestartActionModeOnNextRefresh; 292 private boolean mRequestingLinkActionMode; 293 294 private SelectionActionModeHelper mSelectionActionModeHelper; 295 296 boolean mIsBeingLongClicked; 297 298 private SuggestionsPopupWindow mSuggestionsPopupWindow; 299 SuggestionRangeSpan mSuggestionRangeSpan; 300 private Runnable mShowSuggestionRunnable; 301 302 Drawable mDrawableForCursor = null; 303 304 private Drawable mSelectHandleLeft; 305 private Drawable mSelectHandleRight; 306 private Drawable mSelectHandleCenter; 307 308 // Global listener that detects changes in the global position of the TextView 309 private PositionListener mPositionListener; 310 311 private float mLastDownPositionX, mLastDownPositionY; 312 private float mLastUpPositionX, mLastUpPositionY; 313 private float mContextMenuAnchorX, mContextMenuAnchorY; 314 Callback mCustomSelectionActionModeCallback; 315 Callback mCustomInsertionActionModeCallback; 316 317 // Set when this TextView gained focus with some text selected. Will start selection mode. 318 boolean mCreatedWithASelection; 319 320 // Indicates the current tap state (first tap, double tap, or triple click). 321 private int mTapState = TAP_STATE_INITIAL; 322 private long mLastTouchUpTime = 0; 323 private static final int TAP_STATE_INITIAL = 0; 324 private static final int TAP_STATE_FIRST_TAP = 1; 325 private static final int TAP_STATE_DOUBLE_TAP = 2; 326 // Only for mouse input. 327 private static final int TAP_STATE_TRIPLE_CLICK = 3; 328 329 // The button state as of the last time #onTouchEvent is called. 330 private int mLastButtonState; 331 332 private Runnable mInsertionActionModeRunnable; 333 334 // The span controller helps monitoring the changes to which the Editor needs to react: 335 // - EasyEditSpans, for which we have some UI to display on attach and on hide 336 // - SelectionSpans, for which we need to call updateSelection if an IME is attached 337 private SpanController mSpanController; 338 339 private WordIterator mWordIterator; 340 SpellChecker mSpellChecker; 341 342 // This word iterator is set with text and used to determine word boundaries 343 // when a user is selecting text. 344 private WordIterator mWordIteratorWithText; 345 // Indicate that the text in the word iterator needs to be updated. 346 private boolean mUpdateWordIteratorText; 347 348 private Rect mTempRect; 349 350 private final TextView mTextView; 351 352 final ProcessTextIntentActionsHandler mProcessTextIntentActionsHandler; 353 354 private final CursorAnchorInfoNotifier mCursorAnchorInfoNotifier = 355 new CursorAnchorInfoNotifier(); 356 357 private final Runnable mShowFloatingToolbar = new Runnable() { 358 @Override 359 public void run() { 360 if (mTextActionMode != null) { 361 mTextActionMode.hide(0); // hide off. 362 } 363 } 364 }; 365 366 boolean mIsInsertionActionModeStartPending = false; 367 368 private final SuggestionHelper mSuggestionHelper = new SuggestionHelper(); 369 370 Editor(TextView textView) { 371 mTextView = textView; 372 // Synchronize the filter list, which places the undo input filter at the end. 373 mTextView.setFilters(mTextView.getFilters()); 374 mProcessTextIntentActionsHandler = new ProcessTextIntentActionsHandler(this); 375 mHapticTextHandleEnabled = mTextView.getContext().getResources().getBoolean( 376 com.android.internal.R.bool.config_enableHapticTextHandle); 377 378 if (FLAG_USE_MAGNIFIER) { 379 mMagnifierAnimator = new MagnifierMotionAnimator(new Magnifier(mTextView)); 380 } 381 } 382 383 ParcelableParcel saveInstanceState() { 384 ParcelableParcel state = new ParcelableParcel(getClass().getClassLoader()); 385 Parcel parcel = state.getParcel(); 386 mUndoManager.saveInstanceState(parcel); 387 mUndoInputFilter.saveInstanceState(parcel); 388 return state; 389 } 390 391 void restoreInstanceState(ParcelableParcel state) { 392 Parcel parcel = state.getParcel(); 393 mUndoManager.restoreInstanceState(parcel, state.getClassLoader()); 394 mUndoInputFilter.restoreInstanceState(parcel); 395 // Re-associate this object as the owner of undo state. 396 mUndoOwner = mUndoManager.getOwner(UNDO_OWNER_TAG, this); 397 } 398 399 /** 400 * Forgets all undo and redo operations for this Editor. 401 */ 402 void forgetUndoRedo() { 403 UndoOwner[] owners = { mUndoOwner }; 404 mUndoManager.forgetUndos(owners, -1 /* all */); 405 mUndoManager.forgetRedos(owners, -1 /* all */); 406 } 407 408 boolean canUndo() { 409 UndoOwner[] owners = { mUndoOwner }; 410 return mAllowUndo && mUndoManager.countUndos(owners) > 0; 411 } 412 413 boolean canRedo() { 414 UndoOwner[] owners = { mUndoOwner }; 415 return mAllowUndo && mUndoManager.countRedos(owners) > 0; 416 } 417 418 void undo() { 419 if (!mAllowUndo) { 420 return; 421 } 422 UndoOwner[] owners = { mUndoOwner }; 423 mUndoManager.undo(owners, 1); // Undo 1 action. 424 } 425 426 void redo() { 427 if (!mAllowUndo) { 428 return; 429 } 430 UndoOwner[] owners = { mUndoOwner }; 431 mUndoManager.redo(owners, 1); // Redo 1 action. 432 } 433 434 void replace() { 435 if (mSuggestionsPopupWindow == null) { 436 mSuggestionsPopupWindow = new SuggestionsPopupWindow(); 437 } 438 hideCursorAndSpanControllers(); 439 mSuggestionsPopupWindow.show(); 440 441 int middle = (mTextView.getSelectionStart() + mTextView.getSelectionEnd()) / 2; 442 Selection.setSelection((Spannable) mTextView.getText(), middle); 443 } 444 445 void onAttachedToWindow() { 446 if (mShowErrorAfterAttach) { 447 showError(); 448 mShowErrorAfterAttach = false; 449 } 450 451 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 452 if (observer.isAlive()) { 453 // No need to create the controller. 454 // The get method will add the listener on controller creation. 455 if (mInsertionPointCursorController != null) { 456 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 457 } 458 if (mSelectionModifierCursorController != null) { 459 mSelectionModifierCursorController.resetTouchOffsets(); 460 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 461 } 462 if (FLAG_USE_MAGNIFIER) { 463 observer.addOnDrawListener(mMagnifierOnDrawListener); 464 } 465 } 466 467 updateSpellCheckSpans(0, mTextView.getText().length(), 468 true /* create the spell checker if needed */); 469 470 if (mTextView.hasSelection()) { 471 refreshTextActionMode(); 472 } 473 474 getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true); 475 resumeBlink(); 476 } 477 478 void onDetachedFromWindow() { 479 getPositionListener().removeSubscriber(mCursorAnchorInfoNotifier); 480 481 if (mError != null) { 482 hideError(); 483 } 484 485 suspendBlink(); 486 487 if (mInsertionPointCursorController != null) { 488 mInsertionPointCursorController.onDetached(); 489 } 490 491 if (mSelectionModifierCursorController != null) { 492 mSelectionModifierCursorController.onDetached(); 493 } 494 495 if (mShowSuggestionRunnable != null) { 496 mTextView.removeCallbacks(mShowSuggestionRunnable); 497 } 498 499 // Cancel the single tap delayed runnable. 500 if (mInsertionActionModeRunnable != null) { 501 mTextView.removeCallbacks(mInsertionActionModeRunnable); 502 } 503 504 mTextView.removeCallbacks(mShowFloatingToolbar); 505 506 discardTextDisplayLists(); 507 508 if (mSpellChecker != null) { 509 mSpellChecker.closeSession(); 510 // Forces the creation of a new SpellChecker next time this window is created. 511 // Will handle the cases where the settings has been changed in the meantime. 512 mSpellChecker = null; 513 } 514 515 if (FLAG_USE_MAGNIFIER) { 516 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 517 if (observer.isAlive()) { 518 observer.removeOnDrawListener(mMagnifierOnDrawListener); 519 } 520 } 521 522 hideCursorAndSpanControllers(); 523 stopTextActionModeWithPreservingSelection(); 524 } 525 526 private void discardTextDisplayLists() { 527 if (mTextRenderNodes != null) { 528 for (int i = 0; i < mTextRenderNodes.length; i++) { 529 RenderNode displayList = mTextRenderNodes[i] != null 530 ? mTextRenderNodes[i].renderNode : null; 531 if (displayList != null && displayList.isValid()) { 532 displayList.discardDisplayList(); 533 } 534 } 535 } 536 } 537 538 private void showError() { 539 if (mTextView.getWindowToken() == null) { 540 mShowErrorAfterAttach = true; 541 return; 542 } 543 544 if (mErrorPopup == null) { 545 LayoutInflater inflater = LayoutInflater.from(mTextView.getContext()); 546 final TextView err = (TextView) inflater.inflate( 547 com.android.internal.R.layout.textview_hint, null); 548 549 final float scale = mTextView.getResources().getDisplayMetrics().density; 550 mErrorPopup = 551 new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f)); 552 mErrorPopup.setFocusable(false); 553 // The user is entering text, so the input method is needed. We 554 // don't want the popup to be displayed on top of it. 555 mErrorPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); 556 } 557 558 TextView tv = (TextView) mErrorPopup.getContentView(); 559 chooseSize(mErrorPopup, mError, tv); 560 tv.setText(mError); 561 562 mErrorPopup.showAsDropDown(mTextView, getErrorX(), getErrorY(), 563 Gravity.TOP | Gravity.LEFT); 564 mErrorPopup.fixDirection(mErrorPopup.isAboveAnchor()); 565 } 566 567 public void setError(CharSequence error, Drawable icon) { 568 mError = TextUtils.stringOrSpannedString(error); 569 mErrorWasChanged = true; 570 571 if (mError == null) { 572 setErrorIcon(null); 573 if (mErrorPopup != null) { 574 if (mErrorPopup.isShowing()) { 575 mErrorPopup.dismiss(); 576 } 577 578 mErrorPopup = null; 579 } 580 mShowErrorAfterAttach = false; 581 } else { 582 setErrorIcon(icon); 583 if (mTextView.isFocused()) { 584 showError(); 585 } 586 } 587 } 588 589 private void setErrorIcon(Drawable icon) { 590 Drawables dr = mTextView.mDrawables; 591 if (dr == null) { 592 mTextView.mDrawables = dr = new Drawables(mTextView.getContext()); 593 } 594 dr.setErrorDrawable(icon, mTextView); 595 596 mTextView.resetResolvedDrawables(); 597 mTextView.invalidate(); 598 mTextView.requestLayout(); 599 } 600 601 private void hideError() { 602 if (mErrorPopup != null) { 603 if (mErrorPopup.isShowing()) { 604 mErrorPopup.dismiss(); 605 } 606 } 607 608 mShowErrorAfterAttach = false; 609 } 610 611 /** 612 * Returns the X offset to make the pointy top of the error point 613 * at the middle of the error icon. 614 */ 615 private int getErrorX() { 616 /* 617 * The "25" is the distance between the point and the right edge 618 * of the background 619 */ 620 final float scale = mTextView.getResources().getDisplayMetrics().density; 621 622 final Drawables dr = mTextView.mDrawables; 623 624 final int layoutDirection = mTextView.getLayoutDirection(); 625 int errorX; 626 int offset; 627 switch (layoutDirection) { 628 default: 629 case View.LAYOUT_DIRECTION_LTR: 630 offset = -(dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f); 631 errorX = mTextView.getWidth() - mErrorPopup.getWidth() 632 - mTextView.getPaddingRight() + offset; 633 break; 634 case View.LAYOUT_DIRECTION_RTL: 635 offset = (dr != null ? dr.mDrawableSizeLeft : 0) / 2 - (int) (25 * scale + 0.5f); 636 errorX = mTextView.getPaddingLeft() + offset; 637 break; 638 } 639 return errorX; 640 } 641 642 /** 643 * Returns the Y offset to make the pointy top of the error point 644 * at the bottom of the error icon. 645 */ 646 private int getErrorY() { 647 /* 648 * Compound, not extended, because the icon is not clipped 649 * if the text height is smaller. 650 */ 651 final int compoundPaddingTop = mTextView.getCompoundPaddingTop(); 652 int vspace = mTextView.getBottom() - mTextView.getTop() 653 - mTextView.getCompoundPaddingBottom() - compoundPaddingTop; 654 655 final Drawables dr = mTextView.mDrawables; 656 657 final int layoutDirection = mTextView.getLayoutDirection(); 658 int height; 659 switch (layoutDirection) { 660 default: 661 case View.LAYOUT_DIRECTION_LTR: 662 height = (dr != null ? dr.mDrawableHeightRight : 0); 663 break; 664 case View.LAYOUT_DIRECTION_RTL: 665 height = (dr != null ? dr.mDrawableHeightLeft : 0); 666 break; 667 } 668 669 int icontop = compoundPaddingTop + (vspace - height) / 2; 670 671 /* 672 * The "2" is the distance between the point and the top edge 673 * of the background. 674 */ 675 final float scale = mTextView.getResources().getDisplayMetrics().density; 676 return icontop + height - mTextView.getHeight() - (int) (2 * scale + 0.5f); 677 } 678 679 void createInputContentTypeIfNeeded() { 680 if (mInputContentType == null) { 681 mInputContentType = new InputContentType(); 682 } 683 } 684 685 void createInputMethodStateIfNeeded() { 686 if (mInputMethodState == null) { 687 mInputMethodState = new InputMethodState(); 688 } 689 } 690 691 private boolean isCursorVisible() { 692 // The default value is true, even when there is no associated Editor 693 return mCursorVisible && mTextView.isTextEditable(); 694 } 695 696 boolean shouldRenderCursor() { 697 if (!isCursorVisible()) { 698 return false; 699 } 700 if (mRenderCursorRegardlessTiming) { 701 return true; 702 } 703 final long showCursorDelta = SystemClock.uptimeMillis() - mShowCursor; 704 return showCursorDelta % (2 * BLINK) < BLINK; 705 } 706 707 void prepareCursorControllers() { 708 boolean windowSupportsHandles = false; 709 710 ViewGroup.LayoutParams params = mTextView.getRootView().getLayoutParams(); 711 if (params instanceof WindowManager.LayoutParams) { 712 WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params; 713 windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW 714 || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW; 715 } 716 717 boolean enabled = windowSupportsHandles && mTextView.getLayout() != null; 718 mInsertionControllerEnabled = enabled && isCursorVisible(); 719 mSelectionControllerEnabled = enabled && mTextView.textCanBeSelected(); 720 721 if (!mInsertionControllerEnabled) { 722 hideInsertionPointCursorController(); 723 if (mInsertionPointCursorController != null) { 724 mInsertionPointCursorController.onDetached(); 725 mInsertionPointCursorController = null; 726 } 727 } 728 729 if (!mSelectionControllerEnabled) { 730 stopTextActionMode(); 731 if (mSelectionModifierCursorController != null) { 732 mSelectionModifierCursorController.onDetached(); 733 mSelectionModifierCursorController = null; 734 } 735 } 736 } 737 738 void hideInsertionPointCursorController() { 739 if (mInsertionPointCursorController != null) { 740 mInsertionPointCursorController.hide(); 741 } 742 } 743 744 /** 745 * Hides the insertion and span controllers. 746 */ 747 void hideCursorAndSpanControllers() { 748 hideCursorControllers(); 749 hideSpanControllers(); 750 } 751 752 private void hideSpanControllers() { 753 if (mSpanController != null) { 754 mSpanController.hide(); 755 } 756 } 757 758 private void hideCursorControllers() { 759 // When mTextView is not ExtractEditText, we need to distinguish two kinds of focus-lost. 760 // One is the true focus lost where suggestions pop-up (if any) should be dismissed, and the 761 // other is an side effect of showing the suggestions pop-up itself. We use isShowingUp() 762 // to distinguish one from the other. 763 if (mSuggestionsPopupWindow != null && ((mTextView.isInExtractedMode()) 764 || !mSuggestionsPopupWindow.isShowingUp())) { 765 // Should be done before hide insertion point controller since it triggers a show of it 766 mSuggestionsPopupWindow.hide(); 767 } 768 hideInsertionPointCursorController(); 769 } 770 771 /** 772 * Create new SpellCheckSpans on the modified region. 773 */ 774 private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) { 775 // Remove spans whose adjacent characters are text not punctuation 776 mTextView.removeAdjacentSuggestionSpans(start); 777 mTextView.removeAdjacentSuggestionSpans(end); 778 779 if (mTextView.isTextEditable() && mTextView.isSuggestionsEnabled() 780 && !(mTextView.isInExtractedMode())) { 781 if (mSpellChecker == null && createSpellChecker) { 782 mSpellChecker = new SpellChecker(mTextView); 783 } 784 if (mSpellChecker != null) { 785 mSpellChecker.spellCheck(start, end); 786 } 787 } 788 } 789 790 void onScreenStateChanged(int screenState) { 791 switch (screenState) { 792 case View.SCREEN_STATE_ON: 793 resumeBlink(); 794 break; 795 case View.SCREEN_STATE_OFF: 796 suspendBlink(); 797 break; 798 } 799 } 800 801 private void suspendBlink() { 802 if (mBlink != null) { 803 mBlink.cancel(); 804 } 805 } 806 807 private void resumeBlink() { 808 if (mBlink != null) { 809 mBlink.uncancel(); 810 makeBlink(); 811 } 812 } 813 814 void adjustInputType(boolean password, boolean passwordInputType, 815 boolean webPasswordInputType, boolean numberPasswordInputType) { 816 // mInputType has been set from inputType, possibly modified by mInputMethod. 817 // Specialize mInputType to [web]password if we have a text class and the original input 818 // type was a password. 819 if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) { 820 if (password || passwordInputType) { 821 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 822 | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD; 823 } 824 if (webPasswordInputType) { 825 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 826 | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 827 } 828 } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) { 829 if (numberPasswordInputType) { 830 mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION)) 831 | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD; 832 } 833 } 834 } 835 836 private void chooseSize(@NonNull PopupWindow pop, @NonNull CharSequence text, 837 @NonNull TextView tv) { 838 final int wid = tv.getPaddingLeft() + tv.getPaddingRight(); 839 final int ht = tv.getPaddingTop() + tv.getPaddingBottom(); 840 841 final int defaultWidthInPixels = mTextView.getResources().getDimensionPixelSize( 842 com.android.internal.R.dimen.textview_error_popup_default_width); 843 final StaticLayout l = StaticLayout.Builder.obtain(text, 0, text.length(), tv.getPaint(), 844 defaultWidthInPixels) 845 .setUseLineSpacingFromFallbacks(tv.mUseFallbackLineSpacing) 846 .build(); 847 848 float max = 0; 849 for (int i = 0; i < l.getLineCount(); i++) { 850 max = Math.max(max, l.getLineWidth(i)); 851 } 852 853 /* 854 * Now set the popup size to be big enough for the text plus the border capped 855 * to DEFAULT_MAX_POPUP_WIDTH 856 */ 857 pop.setWidth(wid + (int) Math.ceil(max)); 858 pop.setHeight(ht + l.getHeight()); 859 } 860 861 void setFrame() { 862 if (mErrorPopup != null) { 863 TextView tv = (TextView) mErrorPopup.getContentView(); 864 chooseSize(mErrorPopup, mError, tv); 865 mErrorPopup.update(mTextView, getErrorX(), getErrorY(), 866 mErrorPopup.getWidth(), mErrorPopup.getHeight()); 867 } 868 } 869 870 private int getWordStart(int offset) { 871 // FIXME - For this and similar methods we're not doing anything to check if there's 872 // a LocaleSpan in the text, this may be something we should try handling or checking for. 873 int retOffset = getWordIteratorWithText().prevBoundary(offset); 874 if (getWordIteratorWithText().isOnPunctuation(retOffset)) { 875 // On punctuation boundary or within group of punctuation, find punctuation start. 876 retOffset = getWordIteratorWithText().getPunctuationBeginning(offset); 877 } else { 878 // Not on a punctuation boundary, find the word start. 879 retOffset = getWordIteratorWithText().getPrevWordBeginningOnTwoWordsBoundary(offset); 880 } 881 if (retOffset == BreakIterator.DONE) { 882 return offset; 883 } 884 return retOffset; 885 } 886 887 private int getWordEnd(int offset) { 888 int retOffset = getWordIteratorWithText().nextBoundary(offset); 889 if (getWordIteratorWithText().isAfterPunctuation(retOffset)) { 890 // On punctuation boundary or within group of punctuation, find punctuation end. 891 retOffset = getWordIteratorWithText().getPunctuationEnd(offset); 892 } else { 893 // Not on a punctuation boundary, find the word end. 894 retOffset = getWordIteratorWithText().getNextWordEndOnTwoWordBoundary(offset); 895 } 896 if (retOffset == BreakIterator.DONE) { 897 return offset; 898 } 899 return retOffset; 900 } 901 902 private boolean needsToSelectAllToSelectWordOrParagraph() { 903 if (mTextView.hasPasswordTransformationMethod()) { 904 // Always select all on a password field. 905 // Cut/copy menu entries are not available for passwords, but being able to select all 906 // is however useful to delete or paste to replace the entire content. 907 return true; 908 } 909 910 int inputType = mTextView.getInputType(); 911 int klass = inputType & InputType.TYPE_MASK_CLASS; 912 int variation = inputType & InputType.TYPE_MASK_VARIATION; 913 914 // Specific text field types: select the entire text for these 915 if (klass == InputType.TYPE_CLASS_NUMBER 916 || klass == InputType.TYPE_CLASS_PHONE 917 || klass == InputType.TYPE_CLASS_DATETIME 918 || variation == InputType.TYPE_TEXT_VARIATION_URI 919 || variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS 920 || variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS 921 || variation == InputType.TYPE_TEXT_VARIATION_FILTER) { 922 return true; 923 } 924 return false; 925 } 926 927 /** 928 * Adjusts selection to the word under last touch offset. Return true if the operation was 929 * successfully performed. 930 */ 931 boolean selectCurrentWord() { 932 if (!mTextView.canSelectText()) { 933 return false; 934 } 935 936 if (needsToSelectAllToSelectWordOrParagraph()) { 937 return mTextView.selectAllText(); 938 } 939 940 long lastTouchOffsets = getLastTouchOffsets(); 941 final int minOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 942 final int maxOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 943 944 // Safety check in case standard touch event handling has been bypassed 945 if (minOffset < 0 || minOffset > mTextView.getText().length()) return false; 946 if (maxOffset < 0 || maxOffset > mTextView.getText().length()) return false; 947 948 int selectionStart, selectionEnd; 949 950 // If a URLSpan (web address, email, phone...) is found at that position, select it. 951 URLSpan[] urlSpans = 952 ((Spanned) mTextView.getText()).getSpans(minOffset, maxOffset, URLSpan.class); 953 if (urlSpans.length >= 1) { 954 URLSpan urlSpan = urlSpans[0]; 955 selectionStart = ((Spanned) mTextView.getText()).getSpanStart(urlSpan); 956 selectionEnd = ((Spanned) mTextView.getText()).getSpanEnd(urlSpan); 957 } else { 958 // FIXME - We should check if there's a LocaleSpan in the text, this may be 959 // something we should try handling or checking for. 960 final WordIterator wordIterator = getWordIterator(); 961 wordIterator.setCharSequence(mTextView.getText(), minOffset, maxOffset); 962 963 selectionStart = wordIterator.getBeginning(minOffset); 964 selectionEnd = wordIterator.getEnd(maxOffset); 965 966 if (selectionStart == BreakIterator.DONE || selectionEnd == BreakIterator.DONE 967 || selectionStart == selectionEnd) { 968 // Possible when the word iterator does not properly handle the text's language 969 long range = getCharClusterRange(minOffset); 970 selectionStart = TextUtils.unpackRangeStartFromLong(range); 971 selectionEnd = TextUtils.unpackRangeEndFromLong(range); 972 } 973 } 974 975 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 976 return selectionEnd > selectionStart; 977 } 978 979 /** 980 * Adjusts selection to the paragraph under last touch offset. Return true if the operation was 981 * successfully performed. 982 */ 983 private boolean selectCurrentParagraph() { 984 if (!mTextView.canSelectText()) { 985 return false; 986 } 987 988 if (needsToSelectAllToSelectWordOrParagraph()) { 989 return mTextView.selectAllText(); 990 } 991 992 long lastTouchOffsets = getLastTouchOffsets(); 993 final int minLastTouchOffset = TextUtils.unpackRangeStartFromLong(lastTouchOffsets); 994 final int maxLastTouchOffset = TextUtils.unpackRangeEndFromLong(lastTouchOffsets); 995 996 final long paragraphsRange = getParagraphsRange(minLastTouchOffset, maxLastTouchOffset); 997 final int start = TextUtils.unpackRangeStartFromLong(paragraphsRange); 998 final int end = TextUtils.unpackRangeEndFromLong(paragraphsRange); 999 if (start < end) { 1000 Selection.setSelection((Spannable) mTextView.getText(), start, end); 1001 return true; 1002 } 1003 return false; 1004 } 1005 1006 /** 1007 * Get the minimum range of paragraphs that contains startOffset and endOffset. 1008 */ 1009 private long getParagraphsRange(int startOffset, int endOffset) { 1010 final Layout layout = mTextView.getLayout(); 1011 if (layout == null) { 1012 return TextUtils.packRangeInLong(-1, -1); 1013 } 1014 final CharSequence text = mTextView.getText(); 1015 int minLine = layout.getLineForOffset(startOffset); 1016 // Search paragraph start. 1017 while (minLine > 0) { 1018 final int prevLineEndOffset = layout.getLineEnd(minLine - 1); 1019 if (text.charAt(prevLineEndOffset - 1) == '\n') { 1020 break; 1021 } 1022 minLine--; 1023 } 1024 int maxLine = layout.getLineForOffset(endOffset); 1025 // Search paragraph end. 1026 while (maxLine < layout.getLineCount() - 1) { 1027 final int lineEndOffset = layout.getLineEnd(maxLine); 1028 if (text.charAt(lineEndOffset - 1) == '\n') { 1029 break; 1030 } 1031 maxLine++; 1032 } 1033 return TextUtils.packRangeInLong(layout.getLineStart(minLine), layout.getLineEnd(maxLine)); 1034 } 1035 1036 void onLocaleChanged() { 1037 // Will be re-created on demand in getWordIterator and getWordIteratorWithText with the 1038 // proper new locale 1039 mWordIterator = null; 1040 mWordIteratorWithText = null; 1041 } 1042 1043 public WordIterator getWordIterator() { 1044 if (mWordIterator == null) { 1045 mWordIterator = new WordIterator(mTextView.getTextServicesLocale()); 1046 } 1047 return mWordIterator; 1048 } 1049 1050 private WordIterator getWordIteratorWithText() { 1051 if (mWordIteratorWithText == null) { 1052 mWordIteratorWithText = new WordIterator(mTextView.getTextServicesLocale()); 1053 mUpdateWordIteratorText = true; 1054 } 1055 if (mUpdateWordIteratorText) { 1056 // FIXME - Shouldn't copy all of the text as only the area of the text relevant 1057 // to the user's selection is needed. A possible solution would be to 1058 // copy some number N of characters near the selection and then when the 1059 // user approaches N then we'd do another copy of the next N characters. 1060 CharSequence text = mTextView.getText(); 1061 mWordIteratorWithText.setCharSequence(text, 0, text.length()); 1062 mUpdateWordIteratorText = false; 1063 } 1064 return mWordIteratorWithText; 1065 } 1066 1067 private int getNextCursorOffset(int offset, boolean findAfterGivenOffset) { 1068 final Layout layout = mTextView.getLayout(); 1069 if (layout == null) return offset; 1070 return findAfterGivenOffset == layout.isRtlCharAt(offset) 1071 ? layout.getOffsetToLeftOf(offset) : layout.getOffsetToRightOf(offset); 1072 } 1073 1074 private long getCharClusterRange(int offset) { 1075 final int textLength = mTextView.getText().length(); 1076 if (offset < textLength) { 1077 final int clusterEndOffset = getNextCursorOffset(offset, true); 1078 return TextUtils.packRangeInLong( 1079 getNextCursorOffset(clusterEndOffset, false), clusterEndOffset); 1080 } 1081 if (offset - 1 >= 0) { 1082 final int clusterStartOffset = getNextCursorOffset(offset, false); 1083 return TextUtils.packRangeInLong(clusterStartOffset, 1084 getNextCursorOffset(clusterStartOffset, true)); 1085 } 1086 return TextUtils.packRangeInLong(offset, offset); 1087 } 1088 1089 private boolean touchPositionIsInSelection() { 1090 int selectionStart = mTextView.getSelectionStart(); 1091 int selectionEnd = mTextView.getSelectionEnd(); 1092 1093 if (selectionStart == selectionEnd) { 1094 return false; 1095 } 1096 1097 if (selectionStart > selectionEnd) { 1098 int tmp = selectionStart; 1099 selectionStart = selectionEnd; 1100 selectionEnd = tmp; 1101 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 1102 } 1103 1104 SelectionModifierCursorController selectionController = getSelectionController(); 1105 int minOffset = selectionController.getMinTouchOffset(); 1106 int maxOffset = selectionController.getMaxTouchOffset(); 1107 1108 return ((minOffset >= selectionStart) && (maxOffset < selectionEnd)); 1109 } 1110 1111 private PositionListener getPositionListener() { 1112 if (mPositionListener == null) { 1113 mPositionListener = new PositionListener(); 1114 } 1115 return mPositionListener; 1116 } 1117 1118 private interface TextViewPositionListener { 1119 public void updatePosition(int parentPositionX, int parentPositionY, 1120 boolean parentPositionChanged, boolean parentScrolled); 1121 } 1122 1123 private boolean isOffsetVisible(int offset) { 1124 Layout layout = mTextView.getLayout(); 1125 if (layout == null) return false; 1126 1127 final int line = layout.getLineForOffset(offset); 1128 final int lineBottom = layout.getLineBottom(line); 1129 final int primaryHorizontal = (int) layout.getPrimaryHorizontal(offset); 1130 return mTextView.isPositionVisible( 1131 primaryHorizontal + mTextView.viewportToContentHorizontalOffset(), 1132 lineBottom + mTextView.viewportToContentVerticalOffset()); 1133 } 1134 1135 /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed 1136 * in the view. Returns false when the position is in the empty space of left/right of text. 1137 */ 1138 private boolean isPositionOnText(float x, float y) { 1139 Layout layout = mTextView.getLayout(); 1140 if (layout == null) return false; 1141 1142 final int line = mTextView.getLineAtCoordinate(y); 1143 x = mTextView.convertToLocalHorizontalCoordinate(x); 1144 1145 if (x < layout.getLineLeft(line)) return false; 1146 if (x > layout.getLineRight(line)) return false; 1147 return true; 1148 } 1149 1150 private void startDragAndDrop() { 1151 getSelectionActionModeHelper().onSelectionDrag(); 1152 1153 // TODO: Fix drag and drop in full screen extracted mode. 1154 if (mTextView.isInExtractedMode()) { 1155 return; 1156 } 1157 final int start = mTextView.getSelectionStart(); 1158 final int end = mTextView.getSelectionEnd(); 1159 CharSequence selectedText = mTextView.getTransformedText(start, end); 1160 ClipData data = ClipData.newPlainText(null, selectedText); 1161 DragLocalState localState = new DragLocalState(mTextView, start, end); 1162 mTextView.startDragAndDrop(data, getTextThumbnailBuilder(start, end), localState, 1163 View.DRAG_FLAG_GLOBAL); 1164 stopTextActionMode(); 1165 if (hasSelectionController()) { 1166 getSelectionController().resetTouchOffsets(); 1167 } 1168 } 1169 1170 public boolean performLongClick(boolean handled) { 1171 // Long press in empty space moves cursor and starts the insertion action mode. 1172 if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) 1173 && mInsertionControllerEnabled) { 1174 final int offset = mTextView.getOffsetForPosition(mLastDownPositionX, 1175 mLastDownPositionY); 1176 Selection.setSelection((Spannable) mTextView.getText(), offset); 1177 getInsertionController().show(); 1178 mIsInsertionActionModeStartPending = true; 1179 handled = true; 1180 MetricsLogger.action( 1181 mTextView.getContext(), 1182 MetricsEvent.TEXT_LONGPRESS, 1183 TextViewMetrics.SUBTYPE_LONG_PRESS_OTHER); 1184 } 1185 1186 if (!handled && mTextActionMode != null) { 1187 if (touchPositionIsInSelection()) { 1188 startDragAndDrop(); 1189 MetricsLogger.action( 1190 mTextView.getContext(), 1191 MetricsEvent.TEXT_LONGPRESS, 1192 TextViewMetrics.SUBTYPE_LONG_PRESS_DRAG_AND_DROP); 1193 } else { 1194 stopTextActionMode(); 1195 selectCurrentWordAndStartDrag(); 1196 MetricsLogger.action( 1197 mTextView.getContext(), 1198 MetricsEvent.TEXT_LONGPRESS, 1199 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1200 } 1201 handled = true; 1202 } 1203 1204 // Start a new selection 1205 if (!handled) { 1206 handled = selectCurrentWordAndStartDrag(); 1207 if (handled) { 1208 MetricsLogger.action( 1209 mTextView.getContext(), 1210 MetricsEvent.TEXT_LONGPRESS, 1211 TextViewMetrics.SUBTYPE_LONG_PRESS_SELECTION); 1212 } 1213 } 1214 1215 return handled; 1216 } 1217 1218 float getLastUpPositionX() { 1219 return mLastUpPositionX; 1220 } 1221 1222 float getLastUpPositionY() { 1223 return mLastUpPositionY; 1224 } 1225 1226 private long getLastTouchOffsets() { 1227 SelectionModifierCursorController selectionController = getSelectionController(); 1228 final int minOffset = selectionController.getMinTouchOffset(); 1229 final int maxOffset = selectionController.getMaxTouchOffset(); 1230 return TextUtils.packRangeInLong(minOffset, maxOffset); 1231 } 1232 1233 void onFocusChanged(boolean focused, int direction) { 1234 mShowCursor = SystemClock.uptimeMillis(); 1235 ensureEndedBatchEdit(); 1236 1237 if (focused) { 1238 int selStart = mTextView.getSelectionStart(); 1239 int selEnd = mTextView.getSelectionEnd(); 1240 1241 // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection 1242 // mode for these, unless there was a specific selection already started. 1243 final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 1244 && selEnd == mTextView.getText().length(); 1245 1246 mCreatedWithASelection = mFrozenWithFocus && mTextView.hasSelection() 1247 && !isFocusHighlighted; 1248 1249 if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) { 1250 // If a tap was used to give focus to that view, move cursor at tap position. 1251 // Has to be done before onTakeFocus, which can be overloaded. 1252 final int lastTapPosition = getLastTapPosition(); 1253 if (lastTapPosition >= 0) { 1254 Selection.setSelection((Spannable) mTextView.getText(), lastTapPosition); 1255 } 1256 1257 // Note this may have to be moved out of the Editor class 1258 MovementMethod mMovement = mTextView.getMovementMethod(); 1259 if (mMovement != null) { 1260 mMovement.onTakeFocus(mTextView, (Spannable) mTextView.getText(), direction); 1261 } 1262 1263 // The DecorView does not have focus when the 'Done' ExtractEditText button is 1264 // pressed. Since it is the ViewAncestor's mView, it requests focus before 1265 // ExtractEditText clears focus, which gives focus to the ExtractEditText. 1266 // This special case ensure that we keep current selection in that case. 1267 // It would be better to know why the DecorView does not have focus at that time. 1268 if (((mTextView.isInExtractedMode()) || mSelectionMoved) 1269 && selStart >= 0 && selEnd >= 0) { 1270 /* 1271 * Someone intentionally set the selection, so let them 1272 * do whatever it is that they wanted to do instead of 1273 * the default on-focus behavior. We reset the selection 1274 * here instead of just skipping the onTakeFocus() call 1275 * because some movement methods do something other than 1276 * just setting the selection in theirs and we still 1277 * need to go through that path. 1278 */ 1279 Selection.setSelection((Spannable) mTextView.getText(), selStart, selEnd); 1280 } 1281 1282 if (mSelectAllOnFocus) { 1283 mTextView.selectAllText(); 1284 } 1285 1286 mTouchFocusSelected = true; 1287 } 1288 1289 mFrozenWithFocus = false; 1290 mSelectionMoved = false; 1291 1292 if (mError != null) { 1293 showError(); 1294 } 1295 1296 makeBlink(); 1297 } else { 1298 if (mError != null) { 1299 hideError(); 1300 } 1301 // Don't leave us in the middle of a batch edit. 1302 mTextView.onEndBatchEdit(); 1303 1304 if (mTextView.isInExtractedMode()) { 1305 hideCursorAndSpanControllers(); 1306 stopTextActionModeWithPreservingSelection(); 1307 } else { 1308 hideCursorAndSpanControllers(); 1309 if (mTextView.isTemporarilyDetached()) { 1310 stopTextActionModeWithPreservingSelection(); 1311 } else { 1312 stopTextActionMode(); 1313 } 1314 downgradeEasyCorrectionSpans(); 1315 } 1316 // No need to create the controller 1317 if (mSelectionModifierCursorController != null) { 1318 mSelectionModifierCursorController.resetTouchOffsets(); 1319 } 1320 1321 ensureNoSelectionIfNonSelectable(); 1322 } 1323 } 1324 1325 private void ensureNoSelectionIfNonSelectable() { 1326 // This could be the case if a TextLink has been tapped. 1327 if (!mTextView.textCanBeSelected() && mTextView.hasSelection()) { 1328 Selection.setSelection((Spannable) mTextView.getText(), 1329 mTextView.length(), mTextView.length()); 1330 } 1331 } 1332 1333 /** 1334 * Downgrades to simple suggestions all the easy correction spans that are not a spell check 1335 * span. 1336 */ 1337 private void downgradeEasyCorrectionSpans() { 1338 CharSequence text = mTextView.getText(); 1339 if (text instanceof Spannable) { 1340 Spannable spannable = (Spannable) text; 1341 SuggestionSpan[] suggestionSpans = spannable.getSpans(0, 1342 spannable.length(), SuggestionSpan.class); 1343 for (int i = 0; i < suggestionSpans.length; i++) { 1344 int flags = suggestionSpans[i].getFlags(); 1345 if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0 1346 && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) { 1347 flags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 1348 suggestionSpans[i].setFlags(flags); 1349 } 1350 } 1351 } 1352 } 1353 1354 void sendOnTextChanged(int start, int before, int after) { 1355 getSelectionActionModeHelper().onTextChanged(start, start + before); 1356 updateSpellCheckSpans(start, start + after, false); 1357 1358 // Flip flag to indicate the word iterator needs to have the text reset. 1359 mUpdateWordIteratorText = true; 1360 1361 // Hide the controllers as soon as text is modified (typing, procedural...) 1362 // We do not hide the span controllers, since they can be added when a new text is 1363 // inserted into the text view (voice IME). 1364 hideCursorControllers(); 1365 // Reset drag accelerator. 1366 if (mSelectionModifierCursorController != null) { 1367 mSelectionModifierCursorController.resetTouchOffsets(); 1368 } 1369 stopTextActionMode(); 1370 } 1371 1372 private int getLastTapPosition() { 1373 // No need to create the controller at that point, no last tap position saved 1374 if (mSelectionModifierCursorController != null) { 1375 int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset(); 1376 if (lastTapPosition >= 0) { 1377 // Safety check, should not be possible. 1378 if (lastTapPosition > mTextView.getText().length()) { 1379 lastTapPosition = mTextView.getText().length(); 1380 } 1381 return lastTapPosition; 1382 } 1383 } 1384 1385 return -1; 1386 } 1387 1388 void onWindowFocusChanged(boolean hasWindowFocus) { 1389 if (hasWindowFocus) { 1390 if (mBlink != null) { 1391 mBlink.uncancel(); 1392 makeBlink(); 1393 } 1394 if (mTextView.hasSelection() && !extractedTextModeWillBeStarted()) { 1395 refreshTextActionMode(); 1396 } 1397 } else { 1398 if (mBlink != null) { 1399 mBlink.cancel(); 1400 } 1401 if (mInputContentType != null) { 1402 mInputContentType.enterDown = false; 1403 } 1404 // Order matters! Must be done before onParentLostFocus to rely on isShowingUp 1405 hideCursorAndSpanControllers(); 1406 stopTextActionModeWithPreservingSelection(); 1407 if (mSuggestionsPopupWindow != null) { 1408 mSuggestionsPopupWindow.onParentLostFocus(); 1409 } 1410 1411 // Don't leave us in the middle of a batch edit. Same as in onFocusChanged 1412 ensureEndedBatchEdit(); 1413 1414 ensureNoSelectionIfNonSelectable(); 1415 } 1416 } 1417 1418 private void updateTapState(MotionEvent event) { 1419 final int action = event.getActionMasked(); 1420 if (action == MotionEvent.ACTION_DOWN) { 1421 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 1422 // Detect double tap and triple click. 1423 if (((mTapState == TAP_STATE_FIRST_TAP) 1424 || ((mTapState == TAP_STATE_DOUBLE_TAP) && isMouse)) 1425 && (SystemClock.uptimeMillis() - mLastTouchUpTime) 1426 <= ViewConfiguration.getDoubleTapTimeout()) { 1427 if (mTapState == TAP_STATE_FIRST_TAP) { 1428 mTapState = TAP_STATE_DOUBLE_TAP; 1429 } else { 1430 mTapState = TAP_STATE_TRIPLE_CLICK; 1431 } 1432 } else { 1433 mTapState = TAP_STATE_FIRST_TAP; 1434 } 1435 } 1436 if (action == MotionEvent.ACTION_UP) { 1437 mLastTouchUpTime = SystemClock.uptimeMillis(); 1438 } 1439 } 1440 1441 private boolean shouldFilterOutTouchEvent(MotionEvent event) { 1442 if (!event.isFromSource(InputDevice.SOURCE_MOUSE)) { 1443 return false; 1444 } 1445 final boolean primaryButtonStateChanged = 1446 ((mLastButtonState ^ event.getButtonState()) & MotionEvent.BUTTON_PRIMARY) != 0; 1447 final int action = event.getActionMasked(); 1448 if ((action == MotionEvent.ACTION_DOWN || action == MotionEvent.ACTION_UP) 1449 && !primaryButtonStateChanged) { 1450 return true; 1451 } 1452 if (action == MotionEvent.ACTION_MOVE 1453 && !event.isButtonPressed(MotionEvent.BUTTON_PRIMARY)) { 1454 return true; 1455 } 1456 return false; 1457 } 1458 1459 void onTouchEvent(MotionEvent event) { 1460 final boolean filterOutEvent = shouldFilterOutTouchEvent(event); 1461 mLastButtonState = event.getButtonState(); 1462 if (filterOutEvent) { 1463 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 1464 mDiscardNextActionUp = true; 1465 } 1466 return; 1467 } 1468 updateTapState(event); 1469 updateFloatingToolbarVisibility(event); 1470 1471 if (hasSelectionController()) { 1472 getSelectionController().onTouchEvent(event); 1473 } 1474 1475 if (mShowSuggestionRunnable != null) { 1476 mTextView.removeCallbacks(mShowSuggestionRunnable); 1477 mShowSuggestionRunnable = null; 1478 } 1479 1480 if (event.getActionMasked() == MotionEvent.ACTION_UP) { 1481 mLastUpPositionX = event.getX(); 1482 mLastUpPositionY = event.getY(); 1483 } 1484 1485 if (event.getActionMasked() == MotionEvent.ACTION_DOWN) { 1486 mLastDownPositionX = event.getX(); 1487 mLastDownPositionY = event.getY(); 1488 1489 // Reset this state; it will be re-set if super.onTouchEvent 1490 // causes focus to move to the view. 1491 mTouchFocusSelected = false; 1492 mIgnoreActionUpEvent = false; 1493 } 1494 } 1495 1496 private void updateFloatingToolbarVisibility(MotionEvent event) { 1497 if (mTextActionMode != null) { 1498 switch (event.getActionMasked()) { 1499 case MotionEvent.ACTION_MOVE: 1500 hideFloatingToolbar(ActionMode.DEFAULT_HIDE_DURATION); 1501 break; 1502 case MotionEvent.ACTION_UP: // fall through 1503 case MotionEvent.ACTION_CANCEL: 1504 showFloatingToolbar(); 1505 } 1506 } 1507 } 1508 1509 void hideFloatingToolbar(int duration) { 1510 if (mTextActionMode != null) { 1511 mTextView.removeCallbacks(mShowFloatingToolbar); 1512 mTextActionMode.hide(duration); 1513 } 1514 } 1515 1516 private void showFloatingToolbar() { 1517 if (mTextActionMode != null) { 1518 // Delay "show" so it doesn't interfere with click confirmations 1519 // or double-clicks that could "dismiss" the floating toolbar. 1520 int delay = ViewConfiguration.getDoubleTapTimeout(); 1521 mTextView.postDelayed(mShowFloatingToolbar, delay); 1522 1523 // This classifies the text and most likely returns before the toolbar is actually 1524 // shown. If not, it will update the toolbar with the result when classification 1525 // returns. We would rather not wait for a long running classification process. 1526 invalidateActionModeAsync(); 1527 } 1528 } 1529 1530 public void beginBatchEdit() { 1531 mInBatchEditControllers = true; 1532 final InputMethodState ims = mInputMethodState; 1533 if (ims != null) { 1534 int nesting = ++ims.mBatchEditNesting; 1535 if (nesting == 1) { 1536 ims.mCursorChanged = false; 1537 ims.mChangedDelta = 0; 1538 if (ims.mContentChanged) { 1539 // We already have a pending change from somewhere else, 1540 // so turn this into a full update. 1541 ims.mChangedStart = 0; 1542 ims.mChangedEnd = mTextView.getText().length(); 1543 } else { 1544 ims.mChangedStart = EXTRACT_UNKNOWN; 1545 ims.mChangedEnd = EXTRACT_UNKNOWN; 1546 ims.mContentChanged = false; 1547 } 1548 mUndoInputFilter.beginBatchEdit(); 1549 mTextView.onBeginBatchEdit(); 1550 } 1551 } 1552 } 1553 1554 public void endBatchEdit() { 1555 mInBatchEditControllers = false; 1556 final InputMethodState ims = mInputMethodState; 1557 if (ims != null) { 1558 int nesting = --ims.mBatchEditNesting; 1559 if (nesting == 0) { 1560 finishBatchEdit(ims); 1561 } 1562 } 1563 } 1564 1565 void ensureEndedBatchEdit() { 1566 final InputMethodState ims = mInputMethodState; 1567 if (ims != null && ims.mBatchEditNesting != 0) { 1568 ims.mBatchEditNesting = 0; 1569 finishBatchEdit(ims); 1570 } 1571 } 1572 1573 void finishBatchEdit(final InputMethodState ims) { 1574 mTextView.onEndBatchEdit(); 1575 mUndoInputFilter.endBatchEdit(); 1576 1577 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1578 mTextView.updateAfterEdit(); 1579 reportExtractedText(); 1580 } else if (ims.mCursorChanged) { 1581 // Cheesy way to get us to report the current cursor location. 1582 mTextView.invalidateCursor(); 1583 } 1584 // sendUpdateSelection knows to avoid sending if the selection did 1585 // not actually change. 1586 sendUpdateSelection(); 1587 1588 // Show drag handles if they were blocked by batch edit mode. 1589 if (mTextActionMode != null) { 1590 final CursorController cursorController = mTextView.hasSelection() 1591 ? getSelectionController() : getInsertionController(); 1592 if (cursorController != null && !cursorController.isActive() 1593 && !cursorController.isCursorBeingModified()) { 1594 cursorController.show(); 1595 } 1596 } 1597 } 1598 1599 static final int EXTRACT_NOTHING = -2; 1600 static final int EXTRACT_UNKNOWN = -1; 1601 1602 boolean extractText(ExtractedTextRequest request, ExtractedText outText) { 1603 return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN, 1604 EXTRACT_UNKNOWN, outText); 1605 } 1606 1607 private boolean extractTextInternal(@Nullable ExtractedTextRequest request, 1608 int partialStartOffset, int partialEndOffset, int delta, 1609 @Nullable ExtractedText outText) { 1610 if (request == null || outText == null) { 1611 return false; 1612 } 1613 1614 final CharSequence content = mTextView.getText(); 1615 if (content == null) { 1616 return false; 1617 } 1618 1619 if (partialStartOffset != EXTRACT_NOTHING) { 1620 final int N = content.length(); 1621 if (partialStartOffset < 0) { 1622 outText.partialStartOffset = outText.partialEndOffset = -1; 1623 partialStartOffset = 0; 1624 partialEndOffset = N; 1625 } else { 1626 // Now use the delta to determine the actual amount of text 1627 // we need. 1628 partialEndOffset += delta; 1629 // Adjust offsets to ensure we contain full spans. 1630 if (content instanceof Spanned) { 1631 Spanned spanned = (Spanned) content; 1632 Object[] spans = spanned.getSpans(partialStartOffset, 1633 partialEndOffset, ParcelableSpan.class); 1634 int i = spans.length; 1635 while (i > 0) { 1636 i--; 1637 int j = spanned.getSpanStart(spans[i]); 1638 if (j < partialStartOffset) partialStartOffset = j; 1639 j = spanned.getSpanEnd(spans[i]); 1640 if (j > partialEndOffset) partialEndOffset = j; 1641 } 1642 } 1643 outText.partialStartOffset = partialStartOffset; 1644 outText.partialEndOffset = partialEndOffset - delta; 1645 1646 if (partialStartOffset > N) { 1647 partialStartOffset = N; 1648 } else if (partialStartOffset < 0) { 1649 partialStartOffset = 0; 1650 } 1651 if (partialEndOffset > N) { 1652 partialEndOffset = N; 1653 } else if (partialEndOffset < 0) { 1654 partialEndOffset = 0; 1655 } 1656 } 1657 if ((request.flags & InputConnection.GET_TEXT_WITH_STYLES) != 0) { 1658 outText.text = content.subSequence(partialStartOffset, 1659 partialEndOffset); 1660 } else { 1661 outText.text = TextUtils.substring(content, partialStartOffset, 1662 partialEndOffset); 1663 } 1664 } else { 1665 outText.partialStartOffset = 0; 1666 outText.partialEndOffset = 0; 1667 outText.text = ""; 1668 } 1669 outText.flags = 0; 1670 if (MetaKeyKeyListener.getMetaState(content, MetaKeyKeyListener.META_SELECTING) != 0) { 1671 outText.flags |= ExtractedText.FLAG_SELECTING; 1672 } 1673 if (mTextView.isSingleLine()) { 1674 outText.flags |= ExtractedText.FLAG_SINGLE_LINE; 1675 } 1676 outText.startOffset = 0; 1677 outText.selectionStart = mTextView.getSelectionStart(); 1678 outText.selectionEnd = mTextView.getSelectionEnd(); 1679 outText.hint = mTextView.getHint(); 1680 return true; 1681 } 1682 1683 boolean reportExtractedText() { 1684 final Editor.InputMethodState ims = mInputMethodState; 1685 if (ims == null) { 1686 return false; 1687 } 1688 ims.mSelectionModeChanged = false; 1689 final ExtractedTextRequest req = ims.mExtractedTextRequest; 1690 if (req == null) { 1691 return false; 1692 } 1693 final InputMethodManager imm = InputMethodManager.peekInstance(); 1694 if (imm == null) { 1695 return false; 1696 } 1697 if (TextView.DEBUG_EXTRACT) { 1698 Log.v(TextView.LOG_TAG, "Retrieving extracted start=" 1699 + ims.mChangedStart 1700 + " end=" + ims.mChangedEnd 1701 + " delta=" + ims.mChangedDelta); 1702 } 1703 if (ims.mChangedStart < 0 && !ims.mContentChanged) { 1704 ims.mChangedStart = EXTRACT_NOTHING; 1705 } 1706 if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd, 1707 ims.mChangedDelta, ims.mExtractedText)) { 1708 if (TextView.DEBUG_EXTRACT) { 1709 Log.v(TextView.LOG_TAG, 1710 "Reporting extracted start=" 1711 + ims.mExtractedText.partialStartOffset 1712 + " end=" + ims.mExtractedText.partialEndOffset 1713 + ": " + ims.mExtractedText.text); 1714 } 1715 1716 imm.updateExtractedText(mTextView, req.token, ims.mExtractedText); 1717 ims.mChangedStart = EXTRACT_UNKNOWN; 1718 ims.mChangedEnd = EXTRACT_UNKNOWN; 1719 ims.mChangedDelta = 0; 1720 ims.mContentChanged = false; 1721 return true; 1722 } 1723 return false; 1724 } 1725 1726 private void sendUpdateSelection() { 1727 if (null != mInputMethodState && mInputMethodState.mBatchEditNesting <= 0) { 1728 final InputMethodManager imm = InputMethodManager.peekInstance(); 1729 if (null != imm) { 1730 final int selectionStart = mTextView.getSelectionStart(); 1731 final int selectionEnd = mTextView.getSelectionEnd(); 1732 int candStart = -1; 1733 int candEnd = -1; 1734 if (mTextView.getText() instanceof Spannable) { 1735 final Spannable sp = (Spannable) mTextView.getText(); 1736 candStart = EditableInputConnection.getComposingSpanStart(sp); 1737 candEnd = EditableInputConnection.getComposingSpanEnd(sp); 1738 } 1739 // InputMethodManager#updateSelection skips sending the message if 1740 // none of the parameters have changed since the last time we called it. 1741 imm.updateSelection(mTextView, 1742 selectionStart, selectionEnd, candStart, candEnd); 1743 } 1744 } 1745 } 1746 1747 void onDraw(Canvas canvas, Layout layout, Path highlight, Paint highlightPaint, 1748 int cursorOffsetVertical) { 1749 final int selectionStart = mTextView.getSelectionStart(); 1750 final int selectionEnd = mTextView.getSelectionEnd(); 1751 1752 final InputMethodState ims = mInputMethodState; 1753 if (ims != null && ims.mBatchEditNesting == 0) { 1754 InputMethodManager imm = InputMethodManager.peekInstance(); 1755 if (imm != null) { 1756 if (imm.isActive(mTextView)) { 1757 if (ims.mContentChanged || ims.mSelectionModeChanged) { 1758 // We are in extract mode and the content has changed 1759 // in some way... just report complete new text to the 1760 // input method. 1761 reportExtractedText(); 1762 } 1763 } 1764 } 1765 } 1766 1767 if (mCorrectionHighlighter != null) { 1768 mCorrectionHighlighter.draw(canvas, cursorOffsetVertical); 1769 } 1770 1771 if (highlight != null && selectionStart == selectionEnd && mDrawableForCursor != null) { 1772 drawCursor(canvas, cursorOffsetVertical); 1773 // Rely on the drawable entirely, do not draw the cursor line. 1774 // Has to be done after the IMM related code above which relies on the highlight. 1775 highlight = null; 1776 } 1777 1778 if (mSelectionActionModeHelper != null) { 1779 mSelectionActionModeHelper.onDraw(canvas); 1780 if (mSelectionActionModeHelper.isDrawingHighlight()) { 1781 highlight = null; 1782 } 1783 } 1784 1785 if (mTextView.canHaveDisplayList() && canvas.isHardwareAccelerated()) { 1786 drawHardwareAccelerated(canvas, layout, highlight, highlightPaint, 1787 cursorOffsetVertical); 1788 } else { 1789 layout.draw(canvas, highlight, highlightPaint, cursorOffsetVertical); 1790 } 1791 } 1792 1793 private void drawHardwareAccelerated(Canvas canvas, Layout layout, Path highlight, 1794 Paint highlightPaint, int cursorOffsetVertical) { 1795 final long lineRange = layout.getLineRangeForDraw(canvas); 1796 int firstLine = TextUtils.unpackRangeStartFromLong(lineRange); 1797 int lastLine = TextUtils.unpackRangeEndFromLong(lineRange); 1798 if (lastLine < 0) return; 1799 1800 layout.drawBackground(canvas, highlight, highlightPaint, cursorOffsetVertical, 1801 firstLine, lastLine); 1802 1803 if (layout instanceof DynamicLayout) { 1804 if (mTextRenderNodes == null) { 1805 mTextRenderNodes = ArrayUtils.emptyArray(TextRenderNode.class); 1806 } 1807 1808 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1809 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1810 int[] blockIndices = dynamicLayout.getBlockIndices(); 1811 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1812 final int indexFirstChangedBlock = dynamicLayout.getIndexFirstChangedBlock(); 1813 1814 final ArraySet<Integer> blockSet = dynamicLayout.getBlocksAlwaysNeedToBeRedrawn(); 1815 if (blockSet != null) { 1816 for (int i = 0; i < blockSet.size(); i++) { 1817 final int blockIndex = dynamicLayout.getBlockIndex(blockSet.valueAt(i)); 1818 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1819 && mTextRenderNodes[blockIndex] != null) { 1820 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1821 } 1822 } 1823 } 1824 1825 int startBlock = Arrays.binarySearch(blockEndLines, 0, numberOfBlocks, firstLine); 1826 if (startBlock < 0) { 1827 startBlock = -(startBlock + 1); 1828 } 1829 startBlock = Math.min(indexFirstChangedBlock, startBlock); 1830 1831 int startIndexToFindAvailableRenderNode = 0; 1832 int lastIndex = numberOfBlocks; 1833 1834 for (int i = startBlock; i < numberOfBlocks; i++) { 1835 final int blockIndex = blockIndices[i]; 1836 if (i >= indexFirstChangedBlock 1837 && blockIndex != DynamicLayout.INVALID_BLOCK_INDEX 1838 && mTextRenderNodes[blockIndex] != null) { 1839 mTextRenderNodes[blockIndex].needsToBeShifted = true; 1840 } 1841 if (blockEndLines[i] < firstLine) { 1842 // Blocks in [indexFirstChangedBlock, firstLine) are not redrawn here. They will 1843 // be redrawn after they get scrolled into drawing range. 1844 continue; 1845 } 1846 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, layout, 1847 highlight, highlightPaint, cursorOffsetVertical, blockEndLines, 1848 blockIndices, i, numberOfBlocks, startIndexToFindAvailableRenderNode); 1849 if (blockEndLines[i] >= lastLine) { 1850 lastIndex = Math.max(indexFirstChangedBlock, i + 1); 1851 break; 1852 } 1853 } 1854 if (blockSet != null) { 1855 for (int i = 0; i < blockSet.size(); i++) { 1856 final int block = blockSet.valueAt(i); 1857 final int blockIndex = dynamicLayout.getBlockIndex(block); 1858 if (blockIndex == DynamicLayout.INVALID_BLOCK_INDEX 1859 || mTextRenderNodes[blockIndex] == null 1860 || mTextRenderNodes[blockIndex].needsToBeShifted) { 1861 startIndexToFindAvailableRenderNode = drawHardwareAcceleratedInner(canvas, 1862 layout, highlight, highlightPaint, cursorOffsetVertical, 1863 blockEndLines, blockIndices, block, numberOfBlocks, 1864 startIndexToFindAvailableRenderNode); 1865 } 1866 } 1867 } 1868 1869 dynamicLayout.setIndexFirstChangedBlock(lastIndex); 1870 } else { 1871 // Boring layout is used for empty and hint text 1872 layout.drawText(canvas, firstLine, lastLine); 1873 } 1874 } 1875 1876 private int drawHardwareAcceleratedInner(Canvas canvas, Layout layout, Path highlight, 1877 Paint highlightPaint, int cursorOffsetVertical, int[] blockEndLines, 1878 int[] blockIndices, int blockInfoIndex, int numberOfBlocks, 1879 int startIndexToFindAvailableRenderNode) { 1880 final int blockEndLine = blockEndLines[blockInfoIndex]; 1881 int blockIndex = blockIndices[blockInfoIndex]; 1882 1883 final boolean blockIsInvalid = blockIndex == DynamicLayout.INVALID_BLOCK_INDEX; 1884 if (blockIsInvalid) { 1885 blockIndex = getAvailableDisplayListIndex(blockIndices, numberOfBlocks, 1886 startIndexToFindAvailableRenderNode); 1887 // Note how dynamic layout's internal block indices get updated from Editor 1888 blockIndices[blockInfoIndex] = blockIndex; 1889 if (mTextRenderNodes[blockIndex] != null) { 1890 mTextRenderNodes[blockIndex].isDirty = true; 1891 } 1892 startIndexToFindAvailableRenderNode = blockIndex + 1; 1893 } 1894 1895 if (mTextRenderNodes[blockIndex] == null) { 1896 mTextRenderNodes[blockIndex] = new TextRenderNode("Text " + blockIndex); 1897 } 1898 1899 final boolean blockDisplayListIsInvalid = mTextRenderNodes[blockIndex].needsRecord(); 1900 RenderNode blockDisplayList = mTextRenderNodes[blockIndex].renderNode; 1901 if (mTextRenderNodes[blockIndex].needsToBeShifted || blockDisplayListIsInvalid) { 1902 final int blockBeginLine = blockInfoIndex == 0 ? 1903 0 : blockEndLines[blockInfoIndex - 1] + 1; 1904 final int top = layout.getLineTop(blockBeginLine); 1905 final int bottom = layout.getLineBottom(blockEndLine); 1906 int left = 0; 1907 int right = mTextView.getWidth(); 1908 if (mTextView.getHorizontallyScrolling()) { 1909 float min = Float.MAX_VALUE; 1910 float max = Float.MIN_VALUE; 1911 for (int line = blockBeginLine; line <= blockEndLine; line++) { 1912 min = Math.min(min, layout.getLineLeft(line)); 1913 max = Math.max(max, layout.getLineRight(line)); 1914 } 1915 left = (int) min; 1916 right = (int) (max + 0.5f); 1917 } 1918 1919 // Rebuild display list if it is invalid 1920 if (blockDisplayListIsInvalid) { 1921 final DisplayListCanvas displayListCanvas = blockDisplayList.start( 1922 right - left, bottom - top); 1923 try { 1924 // drawText is always relative to TextView's origin, this translation 1925 // brings this range of text back to the top left corner of the viewport 1926 displayListCanvas.translate(-left, -top); 1927 layout.drawText(displayListCanvas, blockBeginLine, blockEndLine); 1928 mTextRenderNodes[blockIndex].isDirty = false; 1929 // No need to untranslate, previous context is popped after 1930 // drawDisplayList 1931 } finally { 1932 blockDisplayList.end(displayListCanvas); 1933 // Same as drawDisplayList below, handled by our TextView's parent 1934 blockDisplayList.setClipToBounds(false); 1935 } 1936 } 1937 1938 // Valid display list only needs to update its drawing location. 1939 blockDisplayList.setLeftTopRightBottom(left, top, right, bottom); 1940 mTextRenderNodes[blockIndex].needsToBeShifted = false; 1941 } 1942 ((DisplayListCanvas) canvas).drawRenderNode(blockDisplayList); 1943 return startIndexToFindAvailableRenderNode; 1944 } 1945 1946 private int getAvailableDisplayListIndex(int[] blockIndices, int numberOfBlocks, 1947 int searchStartIndex) { 1948 int length = mTextRenderNodes.length; 1949 for (int i = searchStartIndex; i < length; i++) { 1950 boolean blockIndexFound = false; 1951 for (int j = 0; j < numberOfBlocks; j++) { 1952 if (blockIndices[j] == i) { 1953 blockIndexFound = true; 1954 break; 1955 } 1956 } 1957 if (blockIndexFound) continue; 1958 return i; 1959 } 1960 1961 // No available index found, the pool has to grow 1962 mTextRenderNodes = GrowingArrayUtils.append(mTextRenderNodes, length, null); 1963 return length; 1964 } 1965 1966 private void drawCursor(Canvas canvas, int cursorOffsetVertical) { 1967 final boolean translate = cursorOffsetVertical != 0; 1968 if (translate) canvas.translate(0, cursorOffsetVertical); 1969 if (mDrawableForCursor != null) { 1970 mDrawableForCursor.draw(canvas); 1971 } 1972 if (translate) canvas.translate(0, -cursorOffsetVertical); 1973 } 1974 1975 void invalidateHandlesAndActionMode() { 1976 if (mSelectionModifierCursorController != null) { 1977 mSelectionModifierCursorController.invalidateHandles(); 1978 } 1979 if (mInsertionPointCursorController != null) { 1980 mInsertionPointCursorController.invalidateHandle(); 1981 } 1982 if (mTextActionMode != null) { 1983 invalidateActionMode(); 1984 } 1985 } 1986 1987 /** 1988 * Invalidates all the sub-display lists that overlap the specified character range 1989 */ 1990 void invalidateTextDisplayList(Layout layout, int start, int end) { 1991 if (mTextRenderNodes != null && layout instanceof DynamicLayout) { 1992 final int firstLine = layout.getLineForOffset(start); 1993 final int lastLine = layout.getLineForOffset(end); 1994 1995 DynamicLayout dynamicLayout = (DynamicLayout) layout; 1996 int[] blockEndLines = dynamicLayout.getBlockEndLines(); 1997 int[] blockIndices = dynamicLayout.getBlockIndices(); 1998 final int numberOfBlocks = dynamicLayout.getNumberOfBlocks(); 1999 2000 int i = 0; 2001 // Skip the blocks before firstLine 2002 while (i < numberOfBlocks) { 2003 if (blockEndLines[i] >= firstLine) break; 2004 i++; 2005 } 2006 2007 // Invalidate all subsequent blocks until lastLine is passed 2008 while (i < numberOfBlocks) { 2009 final int blockIndex = blockIndices[i]; 2010 if (blockIndex != DynamicLayout.INVALID_BLOCK_INDEX) { 2011 mTextRenderNodes[blockIndex].isDirty = true; 2012 } 2013 if (blockEndLines[i] >= lastLine) break; 2014 i++; 2015 } 2016 } 2017 } 2018 2019 void invalidateTextDisplayList() { 2020 if (mTextRenderNodes != null) { 2021 for (int i = 0; i < mTextRenderNodes.length; i++) { 2022 if (mTextRenderNodes[i] != null) mTextRenderNodes[i].isDirty = true; 2023 } 2024 } 2025 } 2026 2027 void updateCursorPosition() { 2028 if (mTextView.mCursorDrawableRes == 0) { 2029 mDrawableForCursor = null; 2030 return; 2031 } 2032 2033 final Layout layout = mTextView.getLayout(); 2034 final int offset = mTextView.getSelectionStart(); 2035 final int line = layout.getLineForOffset(offset); 2036 final int top = layout.getLineTop(line); 2037 final int bottom = layout.getLineBottomWithoutSpacing(line); 2038 2039 final boolean clamped = layout.shouldClampCursor(line); 2040 updateCursorPosition(top, bottom, layout.getPrimaryHorizontal(offset, clamped)); 2041 } 2042 2043 void refreshTextActionMode() { 2044 if (extractedTextModeWillBeStarted()) { 2045 mRestartActionModeOnNextRefresh = false; 2046 return; 2047 } 2048 final boolean hasSelection = mTextView.hasSelection(); 2049 final SelectionModifierCursorController selectionController = getSelectionController(); 2050 final InsertionPointCursorController insertionController = getInsertionController(); 2051 if ((selectionController != null && selectionController.isCursorBeingModified()) 2052 || (insertionController != null && insertionController.isCursorBeingModified())) { 2053 // ActionMode should be managed by the currently active cursor controller. 2054 mRestartActionModeOnNextRefresh = false; 2055 return; 2056 } 2057 if (hasSelection) { 2058 hideInsertionPointCursorController(); 2059 if (mTextActionMode == null) { 2060 if (mRestartActionModeOnNextRefresh) { 2061 // To avoid distraction, newly start action mode only when selection action 2062 // mode is being restarted. 2063 startSelectionActionModeAsync(false); 2064 } 2065 } else if (selectionController == null || !selectionController.isActive()) { 2066 // Insertion action mode is active. Avoid dismissing the selection. 2067 stopTextActionModeWithPreservingSelection(); 2068 startSelectionActionModeAsync(false); 2069 } else { 2070 mTextActionMode.invalidateContentRect(); 2071 } 2072 } else { 2073 // Insertion action mode is started only when insertion controller is explicitly 2074 // activated. 2075 if (insertionController == null || !insertionController.isActive()) { 2076 stopTextActionMode(); 2077 } else if (mTextActionMode != null) { 2078 mTextActionMode.invalidateContentRect(); 2079 } 2080 } 2081 mRestartActionModeOnNextRefresh = false; 2082 } 2083 2084 /** 2085 * Start an Insertion action mode. 2086 */ 2087 void startInsertionActionMode() { 2088 if (mInsertionActionModeRunnable != null) { 2089 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2090 } 2091 if (extractedTextModeWillBeStarted()) { 2092 return; 2093 } 2094 stopTextActionMode(); 2095 2096 ActionMode.Callback actionModeCallback = 2097 new TextActionModeCallback(TextActionMode.INSERTION); 2098 mTextActionMode = mTextView.startActionMode( 2099 actionModeCallback, ActionMode.TYPE_FLOATING); 2100 if (mTextActionMode != null && getInsertionController() != null) { 2101 getInsertionController().show(); 2102 } 2103 } 2104 2105 @NonNull 2106 TextView getTextView() { 2107 return mTextView; 2108 } 2109 2110 @Nullable 2111 ActionMode getTextActionMode() { 2112 return mTextActionMode; 2113 } 2114 2115 void setRestartActionModeOnNextRefresh(boolean value) { 2116 mRestartActionModeOnNextRefresh = value; 2117 } 2118 2119 /** 2120 * Asynchronously starts a selection action mode using the TextClassifier. 2121 */ 2122 void startSelectionActionModeAsync(boolean adjustSelection) { 2123 getSelectionActionModeHelper().startSelectionActionModeAsync(adjustSelection); 2124 } 2125 2126 void startLinkActionModeAsync(int start, int end) { 2127 if (!(mTextView.getText() instanceof Spannable)) { 2128 return; 2129 } 2130 stopTextActionMode(); 2131 mRequestingLinkActionMode = true; 2132 getSelectionActionModeHelper().startLinkActionModeAsync(start, end); 2133 } 2134 2135 /** 2136 * Asynchronously invalidates an action mode using the TextClassifier. 2137 */ 2138 void invalidateActionModeAsync() { 2139 getSelectionActionModeHelper().invalidateActionModeAsync(); 2140 } 2141 2142 /** 2143 * Synchronously invalidates an action mode without the TextClassifier. 2144 */ 2145 private void invalidateActionMode() { 2146 if (mTextActionMode != null) { 2147 mTextActionMode.invalidate(); 2148 } 2149 } 2150 2151 private SelectionActionModeHelper getSelectionActionModeHelper() { 2152 if (mSelectionActionModeHelper == null) { 2153 mSelectionActionModeHelper = new SelectionActionModeHelper(this); 2154 } 2155 return mSelectionActionModeHelper; 2156 } 2157 2158 /** 2159 * If the TextView allows text selection, selects the current word when no existing selection 2160 * was available and starts a drag. 2161 * 2162 * @return true if the drag was started. 2163 */ 2164 private boolean selectCurrentWordAndStartDrag() { 2165 if (mInsertionActionModeRunnable != null) { 2166 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2167 } 2168 if (extractedTextModeWillBeStarted()) { 2169 return false; 2170 } 2171 if (!checkField()) { 2172 return false; 2173 } 2174 if (!mTextView.hasSelection() && !selectCurrentWord()) { 2175 // No selection and cannot select a word. 2176 return false; 2177 } 2178 stopTextActionModeWithPreservingSelection(); 2179 getSelectionController().enterDrag( 2180 SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_WORD); 2181 return true; 2182 } 2183 2184 /** 2185 * Checks whether a selection can be performed on the current TextView. 2186 * 2187 * @return true if a selection can be performed 2188 */ 2189 boolean checkField() { 2190 if (!mTextView.canSelectText() || !mTextView.requestFocus()) { 2191 Log.w(TextView.LOG_TAG, 2192 "TextView does not support text selection. Selection cancelled."); 2193 return false; 2194 } 2195 return true; 2196 } 2197 2198 boolean startActionModeInternal(@TextActionMode int actionMode) { 2199 if (extractedTextModeWillBeStarted()) { 2200 return false; 2201 } 2202 if (mTextActionMode != null) { 2203 // Text action mode is already started 2204 invalidateActionMode(); 2205 return false; 2206 } 2207 2208 if (actionMode != TextActionMode.TEXT_LINK 2209 && (!checkField() || !mTextView.hasSelection())) { 2210 return false; 2211 } 2212 2213 ActionMode.Callback actionModeCallback = new TextActionModeCallback(actionMode); 2214 mTextActionMode = mTextView.startActionMode(actionModeCallback, ActionMode.TYPE_FLOATING); 2215 2216 final boolean selectionStarted = mTextActionMode != null; 2217 if (selectionStarted 2218 && mTextView.isTextEditable() && !mTextView.isTextSelectable() 2219 && mShowSoftInputOnFocus) { 2220 // Show the IME to be able to replace text, except when selecting non editable text. 2221 final InputMethodManager imm = InputMethodManager.peekInstance(); 2222 if (imm != null) { 2223 imm.showSoftInput(mTextView, 0, null); 2224 } 2225 } 2226 return selectionStarted; 2227 } 2228 2229 private boolean extractedTextModeWillBeStarted() { 2230 if (!(mTextView.isInExtractedMode())) { 2231 final InputMethodManager imm = InputMethodManager.peekInstance(); 2232 return imm != null && imm.isFullscreenMode(); 2233 } 2234 return false; 2235 } 2236 2237 /** 2238 * @return <code>true</code> if it's reasonable to offer to show suggestions depending on 2239 * the current cursor position or selection range. This method is consistent with the 2240 * method to show suggestions {@link SuggestionsPopupWindow#updateSuggestions}. 2241 */ 2242 private boolean shouldOfferToShowSuggestions() { 2243 CharSequence text = mTextView.getText(); 2244 if (!(text instanceof Spannable)) return false; 2245 2246 final Spannable spannable = (Spannable) text; 2247 final int selectionStart = mTextView.getSelectionStart(); 2248 final int selectionEnd = mTextView.getSelectionEnd(); 2249 final SuggestionSpan[] suggestionSpans = spannable.getSpans(selectionStart, selectionEnd, 2250 SuggestionSpan.class); 2251 if (suggestionSpans.length == 0) { 2252 return false; 2253 } 2254 if (selectionStart == selectionEnd) { 2255 // Spans overlap the cursor. 2256 for (int i = 0; i < suggestionSpans.length; i++) { 2257 if (suggestionSpans[i].getSuggestions().length > 0) { 2258 return true; 2259 } 2260 } 2261 return false; 2262 } 2263 int minSpanStart = mTextView.getText().length(); 2264 int maxSpanEnd = 0; 2265 int unionOfSpansCoveringSelectionStartStart = mTextView.getText().length(); 2266 int unionOfSpansCoveringSelectionStartEnd = 0; 2267 boolean hasValidSuggestions = false; 2268 for (int i = 0; i < suggestionSpans.length; i++) { 2269 final int spanStart = spannable.getSpanStart(suggestionSpans[i]); 2270 final int spanEnd = spannable.getSpanEnd(suggestionSpans[i]); 2271 minSpanStart = Math.min(minSpanStart, spanStart); 2272 maxSpanEnd = Math.max(maxSpanEnd, spanEnd); 2273 if (selectionStart < spanStart || selectionStart > spanEnd) { 2274 // The span doesn't cover the current selection start point. 2275 continue; 2276 } 2277 hasValidSuggestions = 2278 hasValidSuggestions || suggestionSpans[i].getSuggestions().length > 0; 2279 unionOfSpansCoveringSelectionStartStart = 2280 Math.min(unionOfSpansCoveringSelectionStartStart, spanStart); 2281 unionOfSpansCoveringSelectionStartEnd = 2282 Math.max(unionOfSpansCoveringSelectionStartEnd, spanEnd); 2283 } 2284 if (!hasValidSuggestions) { 2285 return false; 2286 } 2287 if (unionOfSpansCoveringSelectionStartStart >= unionOfSpansCoveringSelectionStartEnd) { 2288 // No spans cover the selection start point. 2289 return false; 2290 } 2291 if (minSpanStart < unionOfSpansCoveringSelectionStartStart 2292 || maxSpanEnd > unionOfSpansCoveringSelectionStartEnd) { 2293 // There is a span that is not covered by the union. In this case, we soouldn't offer 2294 // to show suggestions as it's confusing. 2295 return false; 2296 } 2297 return true; 2298 } 2299 2300 /** 2301 * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with 2302 * {@link SuggestionSpan#FLAG_EASY_CORRECT} set. 2303 */ 2304 private boolean isCursorInsideEasyCorrectionSpan() { 2305 Spannable spannable = (Spannable) mTextView.getText(); 2306 SuggestionSpan[] suggestionSpans = spannable.getSpans(mTextView.getSelectionStart(), 2307 mTextView.getSelectionEnd(), SuggestionSpan.class); 2308 for (int i = 0; i < suggestionSpans.length; i++) { 2309 if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) { 2310 return true; 2311 } 2312 } 2313 return false; 2314 } 2315 2316 void onTouchUpEvent(MotionEvent event) { 2317 if (getSelectionActionModeHelper().resetSelection( 2318 getTextView().getOffsetForPosition(event.getX(), event.getY()))) { 2319 return; 2320 } 2321 2322 boolean selectAllGotFocus = mSelectAllOnFocus && mTextView.didTouchFocusSelect(); 2323 hideCursorAndSpanControllers(); 2324 stopTextActionMode(); 2325 CharSequence text = mTextView.getText(); 2326 if (!selectAllGotFocus && text.length() > 0) { 2327 // Move cursor 2328 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2329 2330 final boolean shouldInsertCursor = !mRequestingLinkActionMode; 2331 if (shouldInsertCursor) { 2332 Selection.setSelection((Spannable) text, offset); 2333 if (mSpellChecker != null) { 2334 // When the cursor moves, the word that was typed may need spell check 2335 mSpellChecker.onSelectionChanged(); 2336 } 2337 } 2338 2339 if (!extractedTextModeWillBeStarted()) { 2340 if (isCursorInsideEasyCorrectionSpan()) { 2341 // Cancel the single tap delayed runnable. 2342 if (mInsertionActionModeRunnable != null) { 2343 mTextView.removeCallbacks(mInsertionActionModeRunnable); 2344 } 2345 2346 mShowSuggestionRunnable = this::replace; 2347 2348 // removeCallbacks is performed on every touch 2349 mTextView.postDelayed(mShowSuggestionRunnable, 2350 ViewConfiguration.getDoubleTapTimeout()); 2351 } else if (hasInsertionController()) { 2352 if (shouldInsertCursor) { 2353 getInsertionController().show(); 2354 } else { 2355 getInsertionController().hide(); 2356 } 2357 } 2358 } 2359 } 2360 } 2361 2362 protected void stopTextActionMode() { 2363 if (mTextActionMode != null) { 2364 // This will hide the mSelectionModifierCursorController 2365 mTextActionMode.finish(); 2366 } 2367 } 2368 2369 private void stopTextActionModeWithPreservingSelection() { 2370 if (mTextActionMode != null) { 2371 mRestartActionModeOnNextRefresh = true; 2372 } 2373 mPreserveSelection = true; 2374 stopTextActionMode(); 2375 mPreserveSelection = false; 2376 } 2377 2378 /** 2379 * @return True if this view supports insertion handles. 2380 */ 2381 boolean hasInsertionController() { 2382 return mInsertionControllerEnabled; 2383 } 2384 2385 /** 2386 * @return True if this view supports selection handles. 2387 */ 2388 boolean hasSelectionController() { 2389 return mSelectionControllerEnabled; 2390 } 2391 2392 private InsertionPointCursorController getInsertionController() { 2393 if (!mInsertionControllerEnabled) { 2394 return null; 2395 } 2396 2397 if (mInsertionPointCursorController == null) { 2398 mInsertionPointCursorController = new InsertionPointCursorController(); 2399 2400 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2401 observer.addOnTouchModeChangeListener(mInsertionPointCursorController); 2402 } 2403 2404 return mInsertionPointCursorController; 2405 } 2406 2407 @Nullable 2408 SelectionModifierCursorController getSelectionController() { 2409 if (!mSelectionControllerEnabled) { 2410 return null; 2411 } 2412 2413 if (mSelectionModifierCursorController == null) { 2414 mSelectionModifierCursorController = new SelectionModifierCursorController(); 2415 2416 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 2417 observer.addOnTouchModeChangeListener(mSelectionModifierCursorController); 2418 } 2419 2420 return mSelectionModifierCursorController; 2421 } 2422 2423 @VisibleForTesting 2424 @Nullable 2425 public Drawable getCursorDrawable() { 2426 return mDrawableForCursor; 2427 } 2428 2429 private void updateCursorPosition(int top, int bottom, float horizontal) { 2430 if (mDrawableForCursor == null) { 2431 mDrawableForCursor = mTextView.getContext().getDrawable( 2432 mTextView.mCursorDrawableRes); 2433 } 2434 final int left = clampHorizontalPosition(mDrawableForCursor, horizontal); 2435 final int width = mDrawableForCursor.getIntrinsicWidth(); 2436 mDrawableForCursor.setBounds(left, top - mTempRect.top, left + width, 2437 bottom + mTempRect.bottom); 2438 } 2439 2440 /** 2441 * Return clamped position for the drawable. If the drawable is within the boundaries of the 2442 * view, then it is offset with the left padding of the cursor drawable. If the drawable is at 2443 * the beginning or the end of the text then its drawable edge is aligned with left or right of 2444 * the view boundary. If the drawable is null, horizontal parameter is aligned to left or right 2445 * of the view. 2446 * 2447 * @param drawable Drawable. Can be null. 2448 * @param horizontal Horizontal position for the drawable. 2449 * @return The clamped horizontal position for the drawable. 2450 */ 2451 private int clampHorizontalPosition(@Nullable final Drawable drawable, float horizontal) { 2452 horizontal = Math.max(0.5f, horizontal - 0.5f); 2453 if (mTempRect == null) mTempRect = new Rect(); 2454 2455 int drawableWidth = 0; 2456 if (drawable != null) { 2457 drawable.getPadding(mTempRect); 2458 drawableWidth = drawable.getIntrinsicWidth(); 2459 } else { 2460 mTempRect.setEmpty(); 2461 } 2462 2463 int scrollX = mTextView.getScrollX(); 2464 float horizontalDiff = horizontal - scrollX; 2465 int viewClippedWidth = mTextView.getWidth() - mTextView.getCompoundPaddingLeft() 2466 - mTextView.getCompoundPaddingRight(); 2467 2468 final int left; 2469 if (horizontalDiff >= (viewClippedWidth - 1f)) { 2470 // at the rightmost position 2471 left = viewClippedWidth + scrollX - (drawableWidth - mTempRect.right); 2472 } else if (Math.abs(horizontalDiff) <= 1f 2473 || (TextUtils.isEmpty(mTextView.getText()) 2474 && (TextView.VERY_WIDE - scrollX) <= (viewClippedWidth + 1f) 2475 && horizontal <= 1f)) { 2476 // at the leftmost position 2477 left = scrollX - mTempRect.left; 2478 } else { 2479 left = (int) horizontal - mTempRect.left; 2480 } 2481 return left; 2482 } 2483 2484 /** 2485 * Called by the framework in response to a text auto-correction (such as fixing a typo using a 2486 * a dictionary) from the current input method, provided by it calling 2487 * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default 2488 * implementation flashes the background of the corrected word to provide feedback to the user. 2489 * 2490 * @param info The auto correct info about the text that was corrected. 2491 */ 2492 public void onCommitCorrection(CorrectionInfo info) { 2493 if (mCorrectionHighlighter == null) { 2494 mCorrectionHighlighter = new CorrectionHighlighter(); 2495 } else { 2496 mCorrectionHighlighter.invalidate(false); 2497 } 2498 2499 mCorrectionHighlighter.highlight(info); 2500 mUndoInputFilter.freezeLastEdit(); 2501 } 2502 2503 void onScrollChanged() { 2504 if (mPositionListener != null) { 2505 mPositionListener.onScrollChanged(); 2506 } 2507 if (mTextActionMode != null) { 2508 mTextActionMode.invalidateContentRect(); 2509 } 2510 } 2511 2512 /** 2513 * @return True when the TextView isFocused and has a valid zero-length selection (cursor). 2514 */ 2515 private boolean shouldBlink() { 2516 if (!isCursorVisible() || !mTextView.isFocused()) return false; 2517 2518 final int start = mTextView.getSelectionStart(); 2519 if (start < 0) return false; 2520 2521 final int end = mTextView.getSelectionEnd(); 2522 if (end < 0) return false; 2523 2524 return start == end; 2525 } 2526 2527 void makeBlink() { 2528 if (shouldBlink()) { 2529 mShowCursor = SystemClock.uptimeMillis(); 2530 if (mBlink == null) mBlink = new Blink(); 2531 mTextView.removeCallbacks(mBlink); 2532 mTextView.postDelayed(mBlink, BLINK); 2533 } else { 2534 if (mBlink != null) mTextView.removeCallbacks(mBlink); 2535 } 2536 } 2537 2538 private class Blink implements Runnable { 2539 private boolean mCancelled; 2540 2541 public void run() { 2542 if (mCancelled) { 2543 return; 2544 } 2545 2546 mTextView.removeCallbacks(this); 2547 2548 if (shouldBlink()) { 2549 if (mTextView.getLayout() != null) { 2550 mTextView.invalidateCursorPath(); 2551 } 2552 2553 mTextView.postDelayed(this, BLINK); 2554 } 2555 } 2556 2557 void cancel() { 2558 if (!mCancelled) { 2559 mTextView.removeCallbacks(this); 2560 mCancelled = true; 2561 } 2562 } 2563 2564 void uncancel() { 2565 mCancelled = false; 2566 } 2567 } 2568 2569 private DragShadowBuilder getTextThumbnailBuilder(int start, int end) { 2570 TextView shadowView = (TextView) View.inflate(mTextView.getContext(), 2571 com.android.internal.R.layout.text_drag_thumbnail, null); 2572 2573 if (shadowView == null) { 2574 throw new IllegalArgumentException("Unable to inflate text drag thumbnail"); 2575 } 2576 2577 if (end - start > DRAG_SHADOW_MAX_TEXT_LENGTH) { 2578 final long range = getCharClusterRange(start + DRAG_SHADOW_MAX_TEXT_LENGTH); 2579 end = TextUtils.unpackRangeEndFromLong(range); 2580 } 2581 final CharSequence text = mTextView.getTransformedText(start, end); 2582 shadowView.setText(text); 2583 shadowView.setTextColor(mTextView.getTextColors()); 2584 2585 shadowView.setTextAppearance(R.styleable.Theme_textAppearanceLarge); 2586 shadowView.setGravity(Gravity.CENTER); 2587 2588 shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 2589 ViewGroup.LayoutParams.WRAP_CONTENT)); 2590 2591 final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); 2592 shadowView.measure(size, size); 2593 2594 shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight()); 2595 shadowView.invalidate(); 2596 return new DragShadowBuilder(shadowView); 2597 } 2598 2599 private static class DragLocalState { 2600 public TextView sourceTextView; 2601 public int start, end; 2602 2603 public DragLocalState(TextView sourceTextView, int start, int end) { 2604 this.sourceTextView = sourceTextView; 2605 this.start = start; 2606 this.end = end; 2607 } 2608 } 2609 2610 void onDrop(DragEvent event) { 2611 SpannableStringBuilder content = new SpannableStringBuilder(); 2612 2613 final DragAndDropPermissions permissions = DragAndDropPermissions.obtain(event); 2614 if (permissions != null) { 2615 permissions.takeTransient(); 2616 } 2617 2618 try { 2619 ClipData clipData = event.getClipData(); 2620 final int itemCount = clipData.getItemCount(); 2621 for (int i = 0; i < itemCount; i++) { 2622 Item item = clipData.getItemAt(i); 2623 content.append(item.coerceToStyledText(mTextView.getContext())); 2624 } 2625 } finally { 2626 if (permissions != null) { 2627 permissions.release(); 2628 } 2629 } 2630 2631 mTextView.beginBatchEdit(); 2632 mUndoInputFilter.freezeLastEdit(); 2633 try { 2634 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 2635 Object localState = event.getLocalState(); 2636 DragLocalState dragLocalState = null; 2637 if (localState instanceof DragLocalState) { 2638 dragLocalState = (DragLocalState) localState; 2639 } 2640 boolean dragDropIntoItself = dragLocalState != null 2641 && dragLocalState.sourceTextView == mTextView; 2642 2643 if (dragDropIntoItself) { 2644 if (offset >= dragLocalState.start && offset < dragLocalState.end) { 2645 // A drop inside the original selection discards the drop. 2646 return; 2647 } 2648 } 2649 2650 final int originalLength = mTextView.getText().length(); 2651 int min = offset; 2652 int max = offset; 2653 2654 Selection.setSelection((Spannable) mTextView.getText(), max); 2655 mTextView.replaceText_internal(min, max, content); 2656 2657 if (dragDropIntoItself) { 2658 int dragSourceStart = dragLocalState.start; 2659 int dragSourceEnd = dragLocalState.end; 2660 if (max <= dragSourceStart) { 2661 // Inserting text before selection has shifted positions 2662 final int shift = mTextView.getText().length() - originalLength; 2663 dragSourceStart += shift; 2664 dragSourceEnd += shift; 2665 } 2666 2667 // Delete original selection 2668 mTextView.deleteText_internal(dragSourceStart, dragSourceEnd); 2669 2670 // Make sure we do not leave two adjacent spaces. 2671 final int prevCharIdx = Math.max(0, dragSourceStart - 1); 2672 final int nextCharIdx = Math.min(mTextView.getText().length(), dragSourceStart + 1); 2673 if (nextCharIdx > prevCharIdx + 1) { 2674 CharSequence t = mTextView.getTransformedText(prevCharIdx, nextCharIdx); 2675 if (Character.isSpaceChar(t.charAt(0)) && Character.isSpaceChar(t.charAt(1))) { 2676 mTextView.deleteText_internal(prevCharIdx, prevCharIdx + 1); 2677 } 2678 } 2679 } 2680 } finally { 2681 mTextView.endBatchEdit(); 2682 mUndoInputFilter.freezeLastEdit(); 2683 } 2684 } 2685 2686 public void addSpanWatchers(Spannable text) { 2687 final int textLength = text.length(); 2688 2689 if (mKeyListener != null) { 2690 text.setSpan(mKeyListener, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2691 } 2692 2693 if (mSpanController == null) { 2694 mSpanController = new SpanController(); 2695 } 2696 text.setSpan(mSpanController, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE); 2697 } 2698 2699 void setContextMenuAnchor(float x, float y) { 2700 mContextMenuAnchorX = x; 2701 mContextMenuAnchorY = y; 2702 } 2703 2704 void onCreateContextMenu(ContextMenu menu) { 2705 if (mIsBeingLongClicked || Float.isNaN(mContextMenuAnchorX) 2706 || Float.isNaN(mContextMenuAnchorY)) { 2707 return; 2708 } 2709 final int offset = mTextView.getOffsetForPosition(mContextMenuAnchorX, mContextMenuAnchorY); 2710 if (offset == -1) { 2711 return; 2712 } 2713 2714 stopTextActionModeWithPreservingSelection(); 2715 if (mTextView.canSelectText()) { 2716 final boolean isOnSelection = mTextView.hasSelection() 2717 && offset >= mTextView.getSelectionStart() 2718 && offset <= mTextView.getSelectionEnd(); 2719 if (!isOnSelection) { 2720 // Right clicked position is not on the selection. Remove the selection and move the 2721 // cursor to the right clicked position. 2722 Selection.setSelection((Spannable) mTextView.getText(), offset); 2723 stopTextActionMode(); 2724 } 2725 } 2726 2727 if (shouldOfferToShowSuggestions()) { 2728 final SuggestionInfo[] suggestionInfoArray = 2729 new SuggestionInfo[SuggestionSpan.SUGGESTIONS_MAX_SIZE]; 2730 for (int i = 0; i < suggestionInfoArray.length; i++) { 2731 suggestionInfoArray[i] = new SuggestionInfo(); 2732 } 2733 final SubMenu subMenu = menu.addSubMenu(Menu.NONE, Menu.NONE, MENU_ITEM_ORDER_REPLACE, 2734 com.android.internal.R.string.replace); 2735 final int numItems = mSuggestionHelper.getSuggestionInfo(suggestionInfoArray, null); 2736 for (int i = 0; i < numItems; i++) { 2737 final SuggestionInfo info = suggestionInfoArray[i]; 2738 subMenu.add(Menu.NONE, Menu.NONE, i, info.mText) 2739 .setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { 2740 @Override 2741 public boolean onMenuItemClick(MenuItem item) { 2742 replaceWithSuggestion(info); 2743 return true; 2744 } 2745 }); 2746 } 2747 } 2748 2749 menu.add(Menu.NONE, TextView.ID_UNDO, MENU_ITEM_ORDER_UNDO, 2750 com.android.internal.R.string.undo) 2751 .setAlphabeticShortcut('z') 2752 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2753 .setEnabled(mTextView.canUndo()); 2754 menu.add(Menu.NONE, TextView.ID_REDO, MENU_ITEM_ORDER_REDO, 2755 com.android.internal.R.string.redo) 2756 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2757 .setEnabled(mTextView.canRedo()); 2758 2759 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 2760 com.android.internal.R.string.cut) 2761 .setAlphabeticShortcut('x') 2762 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2763 .setEnabled(mTextView.canCut()); 2764 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 2765 com.android.internal.R.string.copy) 2766 .setAlphabeticShortcut('c') 2767 .setOnMenuItemClickListener(mOnContextMenuItemClickListener) 2768 .setEnabled(mTextView.canCopy()); 2769 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 2770 com.android.internal.R.string.paste) 2771 .setAlphabeticShortcut('v') 2772 .setEnabled(mTextView.canPaste()) 2773 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2774 menu.add(Menu.NONE, TextView.ID_PASTE_AS_PLAIN_TEXT, MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 2775 com.android.internal.R.string.paste_as_plain_text) 2776 .setEnabled(mTextView.canPasteAsPlainText()) 2777 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2778 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 2779 com.android.internal.R.string.share) 2780 .setEnabled(mTextView.canShare()) 2781 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2782 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 2783 com.android.internal.R.string.selectAll) 2784 .setAlphabeticShortcut('a') 2785 .setEnabled(mTextView.canSelectAllText()) 2786 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2787 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 2788 android.R.string.autofill) 2789 .setEnabled(mTextView.canRequestAutofill()) 2790 .setOnMenuItemClickListener(mOnContextMenuItemClickListener); 2791 2792 mPreserveSelection = true; 2793 } 2794 2795 @Nullable 2796 private SuggestionSpan findEquivalentSuggestionSpan( 2797 @NonNull SuggestionSpanInfo suggestionSpanInfo) { 2798 final Editable editable = (Editable) mTextView.getText(); 2799 if (editable.getSpanStart(suggestionSpanInfo.mSuggestionSpan) >= 0) { 2800 // Exactly same span is found. 2801 return suggestionSpanInfo.mSuggestionSpan; 2802 } 2803 // Suggestion span couldn't be found. Try to find a suggestion span that has the same 2804 // contents. 2805 final SuggestionSpan[] suggestionSpans = editable.getSpans(suggestionSpanInfo.mSpanStart, 2806 suggestionSpanInfo.mSpanEnd, SuggestionSpan.class); 2807 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 2808 final int start = editable.getSpanStart(suggestionSpan); 2809 if (start != suggestionSpanInfo.mSpanStart) { 2810 continue; 2811 } 2812 final int end = editable.getSpanEnd(suggestionSpan); 2813 if (end != suggestionSpanInfo.mSpanEnd) { 2814 continue; 2815 } 2816 if (suggestionSpan.equals(suggestionSpanInfo.mSuggestionSpan)) { 2817 return suggestionSpan; 2818 } 2819 } 2820 return null; 2821 } 2822 2823 private void replaceWithSuggestion(@NonNull final SuggestionInfo suggestionInfo) { 2824 final SuggestionSpan targetSuggestionSpan = findEquivalentSuggestionSpan( 2825 suggestionInfo.mSuggestionSpanInfo); 2826 if (targetSuggestionSpan == null) { 2827 // Span has been removed 2828 return; 2829 } 2830 final Editable editable = (Editable) mTextView.getText(); 2831 final int spanStart = editable.getSpanStart(targetSuggestionSpan); 2832 final int spanEnd = editable.getSpanEnd(targetSuggestionSpan); 2833 if (spanStart < 0 || spanEnd <= spanStart) { 2834 // Span has been removed 2835 return; 2836 } 2837 2838 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 2839 // SuggestionSpans are removed by replace: save them before 2840 SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd, 2841 SuggestionSpan.class); 2842 final int length = suggestionSpans.length; 2843 int[] suggestionSpansStarts = new int[length]; 2844 int[] suggestionSpansEnds = new int[length]; 2845 int[] suggestionSpansFlags = new int[length]; 2846 for (int i = 0; i < length; i++) { 2847 final SuggestionSpan suggestionSpan = suggestionSpans[i]; 2848 suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan); 2849 suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan); 2850 suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan); 2851 2852 // Remove potential misspelled flags 2853 int suggestionSpanFlags = suggestionSpan.getFlags(); 2854 if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) != 0) { 2855 suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED; 2856 suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT; 2857 suggestionSpan.setFlags(suggestionSpanFlags); 2858 } 2859 } 2860 2861 // Notify source IME of the suggestion pick. Do this before swapping texts. 2862 targetSuggestionSpan.notifySelection( 2863 mTextView.getContext(), originalText, suggestionInfo.mSuggestionIndex); 2864 2865 // Swap text content between actual text and Suggestion span 2866 final int suggestionStart = suggestionInfo.mSuggestionStart; 2867 final int suggestionEnd = suggestionInfo.mSuggestionEnd; 2868 final String suggestion = suggestionInfo.mText.subSequence( 2869 suggestionStart, suggestionEnd).toString(); 2870 mTextView.replaceText_internal(spanStart, spanEnd, suggestion); 2871 2872 String[] suggestions = targetSuggestionSpan.getSuggestions(); 2873 suggestions[suggestionInfo.mSuggestionIndex] = originalText; 2874 2875 // Restore previous SuggestionSpans 2876 final int lengthDelta = suggestion.length() - (spanEnd - spanStart); 2877 for (int i = 0; i < length; i++) { 2878 // Only spans that include the modified region make sense after replacement 2879 // Spans partially included in the replaced region are removed, there is no 2880 // way to assign them a valid range after replacement 2881 if (suggestionSpansStarts[i] <= spanStart && suggestionSpansEnds[i] >= spanEnd) { 2882 mTextView.setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i], 2883 suggestionSpansEnds[i] + lengthDelta, suggestionSpansFlags[i]); 2884 } 2885 } 2886 // Move cursor at the end of the replaced word 2887 final int newCursorPosition = spanEnd + lengthDelta; 2888 mTextView.setCursorPosition_internal(newCursorPosition, newCursorPosition); 2889 } 2890 2891 private final MenuItem.OnMenuItemClickListener mOnContextMenuItemClickListener = 2892 new MenuItem.OnMenuItemClickListener() { 2893 @Override 2894 public boolean onMenuItemClick(MenuItem item) { 2895 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 2896 return true; 2897 } 2898 return mTextView.onTextContextMenuItem(item.getItemId()); 2899 } 2900 }; 2901 2902 /** 2903 * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related 2904 * pop-up should be displayed. 2905 * Also monitors {@link Selection} to call back to the attached input method. 2906 */ 2907 private class SpanController implements SpanWatcher { 2908 2909 private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs 2910 2911 private EasyEditPopupWindow mPopupWindow; 2912 2913 private Runnable mHidePopup; 2914 2915 // This function is pure but inner classes can't have static functions 2916 private boolean isNonIntermediateSelectionSpan(final Spannable text, 2917 final Object span) { 2918 return (Selection.SELECTION_START == span || Selection.SELECTION_END == span) 2919 && (text.getSpanFlags(span) & Spanned.SPAN_INTERMEDIATE) == 0; 2920 } 2921 2922 @Override 2923 public void onSpanAdded(Spannable text, Object span, int start, int end) { 2924 if (isNonIntermediateSelectionSpan(text, span)) { 2925 sendUpdateSelection(); 2926 } else if (span instanceof EasyEditSpan) { 2927 if (mPopupWindow == null) { 2928 mPopupWindow = new EasyEditPopupWindow(); 2929 mHidePopup = new Runnable() { 2930 @Override 2931 public void run() { 2932 hide(); 2933 } 2934 }; 2935 } 2936 2937 // Make sure there is only at most one EasyEditSpan in the text 2938 if (mPopupWindow.mEasyEditSpan != null) { 2939 mPopupWindow.mEasyEditSpan.setDeleteEnabled(false); 2940 } 2941 2942 mPopupWindow.setEasyEditSpan((EasyEditSpan) span); 2943 mPopupWindow.setOnDeleteListener(new EasyEditDeleteListener() { 2944 @Override 2945 public void onDeleteClick(EasyEditSpan span) { 2946 Editable editable = (Editable) mTextView.getText(); 2947 int start = editable.getSpanStart(span); 2948 int end = editable.getSpanEnd(span); 2949 if (start >= 0 && end >= 0) { 2950 sendEasySpanNotification(EasyEditSpan.TEXT_DELETED, span); 2951 mTextView.deleteText_internal(start, end); 2952 } 2953 editable.removeSpan(span); 2954 } 2955 }); 2956 2957 if (mTextView.getWindowVisibility() != View.VISIBLE) { 2958 // The window is not visible yet, ignore the text change. 2959 return; 2960 } 2961 2962 if (mTextView.getLayout() == null) { 2963 // The view has not been laid out yet, ignore the text change 2964 return; 2965 } 2966 2967 if (extractedTextModeWillBeStarted()) { 2968 // The input is in extract mode. Do not handle the easy edit in 2969 // the original TextView, as the ExtractEditText will do 2970 return; 2971 } 2972 2973 mPopupWindow.show(); 2974 mTextView.removeCallbacks(mHidePopup); 2975 mTextView.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS); 2976 } 2977 } 2978 2979 @Override 2980 public void onSpanRemoved(Spannable text, Object span, int start, int end) { 2981 if (isNonIntermediateSelectionSpan(text, span)) { 2982 sendUpdateSelection(); 2983 } else if (mPopupWindow != null && span == mPopupWindow.mEasyEditSpan) { 2984 hide(); 2985 } 2986 } 2987 2988 @Override 2989 public void onSpanChanged(Spannable text, Object span, int previousStart, int previousEnd, 2990 int newStart, int newEnd) { 2991 if (isNonIntermediateSelectionSpan(text, span)) { 2992 sendUpdateSelection(); 2993 } else if (mPopupWindow != null && span instanceof EasyEditSpan) { 2994 EasyEditSpan easyEditSpan = (EasyEditSpan) span; 2995 sendEasySpanNotification(EasyEditSpan.TEXT_MODIFIED, easyEditSpan); 2996 text.removeSpan(easyEditSpan); 2997 } 2998 } 2999 3000 public void hide() { 3001 if (mPopupWindow != null) { 3002 mPopupWindow.hide(); 3003 mTextView.removeCallbacks(mHidePopup); 3004 } 3005 } 3006 3007 private void sendEasySpanNotification(int textChangedType, EasyEditSpan span) { 3008 try { 3009 PendingIntent pendingIntent = span.getPendingIntent(); 3010 if (pendingIntent != null) { 3011 Intent intent = new Intent(); 3012 intent.putExtra(EasyEditSpan.EXTRA_TEXT_CHANGED_TYPE, textChangedType); 3013 pendingIntent.send(mTextView.getContext(), 0, intent); 3014 } 3015 } catch (CanceledException e) { 3016 // This should not happen, as we should try to send the intent only once. 3017 Log.w(TAG, "PendingIntent for notification cannot be sent", e); 3018 } 3019 } 3020 } 3021 3022 /** 3023 * Listens for the delete event triggered by {@link EasyEditPopupWindow}. 3024 */ 3025 private interface EasyEditDeleteListener { 3026 3027 /** 3028 * Clicks the delete pop-up. 3029 */ 3030 void onDeleteClick(EasyEditSpan span); 3031 } 3032 3033 /** 3034 * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled 3035 * by {@link SpanController}. 3036 */ 3037 private class EasyEditPopupWindow extends PinnedPopupWindow 3038 implements OnClickListener { 3039 private static final int POPUP_TEXT_LAYOUT = 3040 com.android.internal.R.layout.text_edit_action_popup_text; 3041 private TextView mDeleteTextView; 3042 private EasyEditSpan mEasyEditSpan; 3043 private EasyEditDeleteListener mOnDeleteListener; 3044 3045 @Override 3046 protected void createPopupWindow() { 3047 mPopupWindow = new PopupWindow(mTextView.getContext(), null, 3048 com.android.internal.R.attr.textSelectHandleWindowStyle); 3049 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 3050 mPopupWindow.setClippingEnabled(true); 3051 } 3052 3053 @Override 3054 protected void initContentView() { 3055 LinearLayout linearLayout = new LinearLayout(mTextView.getContext()); 3056 linearLayout.setOrientation(LinearLayout.HORIZONTAL); 3057 mContentView = linearLayout; 3058 mContentView.setBackgroundResource( 3059 com.android.internal.R.drawable.text_edit_side_paste_window); 3060 3061 LayoutInflater inflater = (LayoutInflater) mTextView.getContext() 3062 .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 3063 3064 LayoutParams wrapContent = new LayoutParams( 3065 ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); 3066 3067 mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null); 3068 mDeleteTextView.setLayoutParams(wrapContent); 3069 mDeleteTextView.setText(com.android.internal.R.string.delete); 3070 mDeleteTextView.setOnClickListener(this); 3071 mContentView.addView(mDeleteTextView); 3072 } 3073 3074 public void setEasyEditSpan(EasyEditSpan easyEditSpan) { 3075 mEasyEditSpan = easyEditSpan; 3076 } 3077 3078 private void setOnDeleteListener(EasyEditDeleteListener listener) { 3079 mOnDeleteListener = listener; 3080 } 3081 3082 @Override 3083 public void onClick(View view) { 3084 if (view == mDeleteTextView 3085 && mEasyEditSpan != null && mEasyEditSpan.isDeleteEnabled() 3086 && mOnDeleteListener != null) { 3087 mOnDeleteListener.onDeleteClick(mEasyEditSpan); 3088 } 3089 } 3090 3091 @Override 3092 public void hide() { 3093 if (mEasyEditSpan != null) { 3094 mEasyEditSpan.setDeleteEnabled(false); 3095 } 3096 mOnDeleteListener = null; 3097 super.hide(); 3098 } 3099 3100 @Override 3101 protected int getTextOffset() { 3102 // Place the pop-up at the end of the span 3103 Editable editable = (Editable) mTextView.getText(); 3104 return editable.getSpanEnd(mEasyEditSpan); 3105 } 3106 3107 @Override 3108 protected int getVerticalLocalPosition(int line) { 3109 final Layout layout = mTextView.getLayout(); 3110 return layout.getLineBottomWithoutSpacing(line); 3111 } 3112 3113 @Override 3114 protected int clipVertically(int positionY) { 3115 // As we display the pop-up below the span, no vertical clipping is required. 3116 return positionY; 3117 } 3118 } 3119 3120 private class PositionListener implements ViewTreeObserver.OnPreDrawListener { 3121 // 3 handles 3122 // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others) 3123 // 1 CursorAnchorInfoNotifier 3124 private static final int MAXIMUM_NUMBER_OF_LISTENERS = 7; 3125 private TextViewPositionListener[] mPositionListeners = 3126 new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS]; 3127 private boolean[] mCanMove = new boolean[MAXIMUM_NUMBER_OF_LISTENERS]; 3128 private boolean mPositionHasChanged = true; 3129 // Absolute position of the TextView with respect to its parent window 3130 private int mPositionX, mPositionY; 3131 private int mPositionXOnScreen, mPositionYOnScreen; 3132 private int mNumberOfListeners; 3133 private boolean mScrollHasChanged; 3134 final int[] mTempCoords = new int[2]; 3135 3136 public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) { 3137 if (mNumberOfListeners == 0) { 3138 updatePosition(); 3139 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3140 vto.addOnPreDrawListener(this); 3141 } 3142 3143 int emptySlotIndex = -1; 3144 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3145 TextViewPositionListener listener = mPositionListeners[i]; 3146 if (listener == positionListener) { 3147 return; 3148 } else if (emptySlotIndex < 0 && listener == null) { 3149 emptySlotIndex = i; 3150 } 3151 } 3152 3153 mPositionListeners[emptySlotIndex] = positionListener; 3154 mCanMove[emptySlotIndex] = canMove; 3155 mNumberOfListeners++; 3156 } 3157 3158 public void removeSubscriber(TextViewPositionListener positionListener) { 3159 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3160 if (mPositionListeners[i] == positionListener) { 3161 mPositionListeners[i] = null; 3162 mNumberOfListeners--; 3163 break; 3164 } 3165 } 3166 3167 if (mNumberOfListeners == 0) { 3168 ViewTreeObserver vto = mTextView.getViewTreeObserver(); 3169 vto.removeOnPreDrawListener(this); 3170 } 3171 } 3172 3173 public int getPositionX() { 3174 return mPositionX; 3175 } 3176 3177 public int getPositionY() { 3178 return mPositionY; 3179 } 3180 3181 public int getPositionXOnScreen() { 3182 return mPositionXOnScreen; 3183 } 3184 3185 public int getPositionYOnScreen() { 3186 return mPositionYOnScreen; 3187 } 3188 3189 @Override 3190 public boolean onPreDraw() { 3191 updatePosition(); 3192 3193 for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) { 3194 if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) { 3195 TextViewPositionListener positionListener = mPositionListeners[i]; 3196 if (positionListener != null) { 3197 positionListener.updatePosition(mPositionX, mPositionY, 3198 mPositionHasChanged, mScrollHasChanged); 3199 } 3200 } 3201 } 3202 3203 mScrollHasChanged = false; 3204 return true; 3205 } 3206 3207 private void updatePosition() { 3208 mTextView.getLocationInWindow(mTempCoords); 3209 3210 mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY; 3211 3212 mPositionX = mTempCoords[0]; 3213 mPositionY = mTempCoords[1]; 3214 3215 mTextView.getLocationOnScreen(mTempCoords); 3216 3217 mPositionXOnScreen = mTempCoords[0]; 3218 mPositionYOnScreen = mTempCoords[1]; 3219 } 3220 3221 public void onScrollChanged() { 3222 mScrollHasChanged = true; 3223 } 3224 } 3225 3226 private abstract class PinnedPopupWindow implements TextViewPositionListener { 3227 protected PopupWindow mPopupWindow; 3228 protected ViewGroup mContentView; 3229 int mPositionX, mPositionY; 3230 int mClippingLimitLeft, mClippingLimitRight; 3231 3232 protected abstract void createPopupWindow(); 3233 protected abstract void initContentView(); 3234 protected abstract int getTextOffset(); 3235 protected abstract int getVerticalLocalPosition(int line); 3236 protected abstract int clipVertically(int positionY); 3237 protected void setUp() { 3238 } 3239 3240 public PinnedPopupWindow() { 3241 // Due to calling subclass methods in base constructor, subclass constructor is not 3242 // called before subclass methods, e.g. createPopupWindow or initContentView. To give 3243 // a chance to initialize subclasses, call setUp() method here. 3244 // TODO: It is good to extract non trivial initialization code from constructor. 3245 setUp(); 3246 3247 createPopupWindow(); 3248 3249 mPopupWindow.setWindowLayoutType( 3250 WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL); 3251 mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 3252 mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 3253 3254 initContentView(); 3255 3256 LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, 3257 ViewGroup.LayoutParams.WRAP_CONTENT); 3258 mContentView.setLayoutParams(wrapContent); 3259 3260 mPopupWindow.setContentView(mContentView); 3261 } 3262 3263 public void show() { 3264 getPositionListener().addSubscriber(this, false /* offset is fixed */); 3265 3266 computeLocalPosition(); 3267 3268 final PositionListener positionListener = getPositionListener(); 3269 updatePosition(positionListener.getPositionX(), positionListener.getPositionY()); 3270 } 3271 3272 protected void measureContent() { 3273 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3274 mContentView.measure( 3275 View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels, 3276 View.MeasureSpec.AT_MOST), 3277 View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels, 3278 View.MeasureSpec.AT_MOST)); 3279 } 3280 3281 /* The popup window will be horizontally centered on the getTextOffset() and vertically 3282 * positioned according to viewportToContentHorizontalOffset. 3283 * 3284 * This method assumes that mContentView has properly been measured from its content. */ 3285 private void computeLocalPosition() { 3286 measureContent(); 3287 final int width = mContentView.getMeasuredWidth(); 3288 final int offset = getTextOffset(); 3289 mPositionX = (int) (mTextView.getLayout().getPrimaryHorizontal(offset) - width / 2.0f); 3290 mPositionX += mTextView.viewportToContentHorizontalOffset(); 3291 3292 final int line = mTextView.getLayout().getLineForOffset(offset); 3293 mPositionY = getVerticalLocalPosition(line); 3294 mPositionY += mTextView.viewportToContentVerticalOffset(); 3295 } 3296 3297 private void updatePosition(int parentPositionX, int parentPositionY) { 3298 int positionX = parentPositionX + mPositionX; 3299 int positionY = parentPositionY + mPositionY; 3300 3301 positionY = clipVertically(positionY); 3302 3303 // Horizontal clipping 3304 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3305 final int width = mContentView.getMeasuredWidth(); 3306 positionX = Math.min( 3307 displayMetrics.widthPixels - width + mClippingLimitRight, positionX); 3308 positionX = Math.max(-mClippingLimitLeft, positionX); 3309 3310 if (isShowing()) { 3311 mPopupWindow.update(positionX, positionY, -1, -1); 3312 } else { 3313 mPopupWindow.showAtLocation(mTextView, Gravity.NO_GRAVITY, 3314 positionX, positionY); 3315 } 3316 } 3317 3318 public void hide() { 3319 if (!isShowing()) { 3320 return; 3321 } 3322 mPopupWindow.dismiss(); 3323 getPositionListener().removeSubscriber(this); 3324 } 3325 3326 @Override 3327 public void updatePosition(int parentPositionX, int parentPositionY, 3328 boolean parentPositionChanged, boolean parentScrolled) { 3329 // Either parentPositionChanged or parentScrolled is true, check if still visible 3330 if (isShowing() && isOffsetVisible(getTextOffset())) { 3331 if (parentScrolled) computeLocalPosition(); 3332 updatePosition(parentPositionX, parentPositionY); 3333 } else { 3334 hide(); 3335 } 3336 } 3337 3338 public boolean isShowing() { 3339 return mPopupWindow.isShowing(); 3340 } 3341 } 3342 3343 private static final class SuggestionInfo { 3344 // Range of actual suggestion within mText 3345 int mSuggestionStart, mSuggestionEnd; 3346 3347 // The SuggestionSpan that this TextView represents 3348 final SuggestionSpanInfo mSuggestionSpanInfo = new SuggestionSpanInfo(); 3349 3350 // The index of this suggestion inside suggestionSpan 3351 int mSuggestionIndex; 3352 3353 final SpannableStringBuilder mText = new SpannableStringBuilder(); 3354 3355 void clear() { 3356 mSuggestionSpanInfo.clear(); 3357 mText.clear(); 3358 } 3359 3360 // Utility method to set attributes about a SuggestionSpan. 3361 void setSpanInfo(SuggestionSpan span, int spanStart, int spanEnd) { 3362 mSuggestionSpanInfo.mSuggestionSpan = span; 3363 mSuggestionSpanInfo.mSpanStart = spanStart; 3364 mSuggestionSpanInfo.mSpanEnd = spanEnd; 3365 } 3366 } 3367 3368 private static final class SuggestionSpanInfo { 3369 // The SuggestionSpan; 3370 @Nullable 3371 SuggestionSpan mSuggestionSpan; 3372 3373 // The SuggestionSpan start position 3374 int mSpanStart; 3375 3376 // The SuggestionSpan end position 3377 int mSpanEnd; 3378 3379 void clear() { 3380 mSuggestionSpan = null; 3381 } 3382 } 3383 3384 private class SuggestionHelper { 3385 private final Comparator<SuggestionSpan> mSuggestionSpanComparator = 3386 new SuggestionSpanComparator(); 3387 private final HashMap<SuggestionSpan, Integer> mSpansLengths = 3388 new HashMap<SuggestionSpan, Integer>(); 3389 3390 private class SuggestionSpanComparator implements Comparator<SuggestionSpan> { 3391 public int compare(SuggestionSpan span1, SuggestionSpan span2) { 3392 final int flag1 = span1.getFlags(); 3393 final int flag2 = span2.getFlags(); 3394 if (flag1 != flag2) { 3395 // The order here should match what is used in updateDrawState 3396 final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3397 final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0; 3398 final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3399 final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0; 3400 if (easy1 && !misspelled1) return -1; 3401 if (easy2 && !misspelled2) return 1; 3402 if (misspelled1) return -1; 3403 if (misspelled2) return 1; 3404 } 3405 3406 return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue(); 3407 } 3408 } 3409 3410 /** 3411 * Returns the suggestion spans that cover the current cursor position. The suggestion 3412 * spans are sorted according to the length of text that they are attached to. 3413 */ 3414 private SuggestionSpan[] getSortedSuggestionSpans() { 3415 int pos = mTextView.getSelectionStart(); 3416 Spannable spannable = (Spannable) mTextView.getText(); 3417 SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class); 3418 3419 mSpansLengths.clear(); 3420 for (SuggestionSpan suggestionSpan : suggestionSpans) { 3421 int start = spannable.getSpanStart(suggestionSpan); 3422 int end = spannable.getSpanEnd(suggestionSpan); 3423 mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start)); 3424 } 3425 3426 // The suggestions are sorted according to their types (easy correction first, then 3427 // misspelled) and to the length of the text that they cover (shorter first). 3428 Arrays.sort(suggestionSpans, mSuggestionSpanComparator); 3429 mSpansLengths.clear(); 3430 3431 return suggestionSpans; 3432 } 3433 3434 /** 3435 * Gets the SuggestionInfo list that contains suggestion information at the current cursor 3436 * position. 3437 * 3438 * @param suggestionInfos SuggestionInfo array the results will be set. 3439 * @param misspelledSpanInfo a struct the misspelled SuggestionSpan info will be set. 3440 * @return the number of suggestions actually fetched. 3441 */ 3442 public int getSuggestionInfo(SuggestionInfo[] suggestionInfos, 3443 @Nullable SuggestionSpanInfo misspelledSpanInfo) { 3444 final Spannable spannable = (Spannable) mTextView.getText(); 3445 final SuggestionSpan[] suggestionSpans = getSortedSuggestionSpans(); 3446 final int nbSpans = suggestionSpans.length; 3447 if (nbSpans == 0) return 0; 3448 3449 int numberOfSuggestions = 0; 3450 for (final SuggestionSpan suggestionSpan : suggestionSpans) { 3451 final int spanStart = spannable.getSpanStart(suggestionSpan); 3452 final int spanEnd = spannable.getSpanEnd(suggestionSpan); 3453 3454 if (misspelledSpanInfo != null 3455 && (suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) { 3456 misspelledSpanInfo.mSuggestionSpan = suggestionSpan; 3457 misspelledSpanInfo.mSpanStart = spanStart; 3458 misspelledSpanInfo.mSpanEnd = spanEnd; 3459 } 3460 3461 final String[] suggestions = suggestionSpan.getSuggestions(); 3462 final int nbSuggestions = suggestions.length; 3463 suggestionLoop: 3464 for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) { 3465 final String suggestion = suggestions[suggestionIndex]; 3466 for (int i = 0; i < numberOfSuggestions; i++) { 3467 final SuggestionInfo otherSuggestionInfo = suggestionInfos[i]; 3468 if (otherSuggestionInfo.mText.toString().equals(suggestion)) { 3469 final int otherSpanStart = 3470 otherSuggestionInfo.mSuggestionSpanInfo.mSpanStart; 3471 final int otherSpanEnd = 3472 otherSuggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3473 if (spanStart == otherSpanStart && spanEnd == otherSpanEnd) { 3474 continue suggestionLoop; 3475 } 3476 } 3477 } 3478 3479 SuggestionInfo suggestionInfo = suggestionInfos[numberOfSuggestions]; 3480 suggestionInfo.setSpanInfo(suggestionSpan, spanStart, spanEnd); 3481 suggestionInfo.mSuggestionIndex = suggestionIndex; 3482 suggestionInfo.mSuggestionStart = 0; 3483 suggestionInfo.mSuggestionEnd = suggestion.length(); 3484 suggestionInfo.mText.replace(0, suggestionInfo.mText.length(), suggestion); 3485 numberOfSuggestions++; 3486 if (numberOfSuggestions >= suggestionInfos.length) { 3487 return numberOfSuggestions; 3488 } 3489 } 3490 } 3491 return numberOfSuggestions; 3492 } 3493 } 3494 3495 @VisibleForTesting 3496 public class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener { 3497 private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE; 3498 3499 // Key of intent extras for inserting new word into user dictionary. 3500 private static final String USER_DICTIONARY_EXTRA_WORD = "word"; 3501 private static final String USER_DICTIONARY_EXTRA_LOCALE = "locale"; 3502 3503 private SuggestionInfo[] mSuggestionInfos; 3504 private int mNumberOfSuggestions; 3505 private boolean mCursorWasVisibleBeforeSuggestions; 3506 private boolean mIsShowingUp = false; 3507 private SuggestionAdapter mSuggestionsAdapter; 3508 private TextAppearanceSpan mHighlightSpan; // TODO: Make mHighlightSpan final. 3509 private TextView mAddToDictionaryButton; 3510 private TextView mDeleteButton; 3511 private ListView mSuggestionListView; 3512 private final SuggestionSpanInfo mMisspelledSpanInfo = new SuggestionSpanInfo(); 3513 private int mContainerMarginWidth; 3514 private int mContainerMarginTop; 3515 private LinearLayout mContainerView; 3516 private Context mContext; // TODO: Make mContext final. 3517 3518 private class CustomPopupWindow extends PopupWindow { 3519 3520 @Override 3521 public void dismiss() { 3522 if (!isShowing()) { 3523 return; 3524 } 3525 super.dismiss(); 3526 getPositionListener().removeSubscriber(SuggestionsPopupWindow.this); 3527 3528 // Safe cast since show() checks that mTextView.getText() is an Editable 3529 ((Spannable) mTextView.getText()).removeSpan(mSuggestionRangeSpan); 3530 3531 mTextView.setCursorVisible(mCursorWasVisibleBeforeSuggestions); 3532 if (hasInsertionController() && !extractedTextModeWillBeStarted()) { 3533 getInsertionController().show(); 3534 } 3535 } 3536 } 3537 3538 public SuggestionsPopupWindow() { 3539 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3540 } 3541 3542 @Override 3543 protected void setUp() { 3544 mContext = applyDefaultTheme(mTextView.getContext()); 3545 mHighlightSpan = new TextAppearanceSpan(mContext, 3546 mTextView.mTextEditSuggestionHighlightStyle); 3547 } 3548 3549 private Context applyDefaultTheme(Context originalContext) { 3550 TypedArray a = originalContext.obtainStyledAttributes( 3551 new int[]{com.android.internal.R.attr.isLightTheme}); 3552 boolean isLightTheme = a.getBoolean(0, true); 3553 int themeId = isLightTheme ? R.style.ThemeOverlay_Material_Light 3554 : R.style.ThemeOverlay_Material_Dark; 3555 a.recycle(); 3556 return new ContextThemeWrapper(originalContext, themeId); 3557 } 3558 3559 @Override 3560 protected void createPopupWindow() { 3561 mPopupWindow = new CustomPopupWindow(); 3562 mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); 3563 mPopupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT)); 3564 mPopupWindow.setFocusable(true); 3565 mPopupWindow.setClippingEnabled(false); 3566 } 3567 3568 @Override 3569 protected void initContentView() { 3570 final LayoutInflater inflater = (LayoutInflater) mContext.getSystemService( 3571 Context.LAYOUT_INFLATER_SERVICE); 3572 mContentView = (ViewGroup) inflater.inflate( 3573 mTextView.mTextEditSuggestionContainerLayout, null); 3574 3575 mContainerView = (LinearLayout) mContentView.findViewById( 3576 com.android.internal.R.id.suggestionWindowContainer); 3577 ViewGroup.MarginLayoutParams lp = 3578 (ViewGroup.MarginLayoutParams) mContainerView.getLayoutParams(); 3579 mContainerMarginWidth = lp.leftMargin + lp.rightMargin; 3580 mContainerMarginTop = lp.topMargin; 3581 mClippingLimitLeft = lp.leftMargin; 3582 mClippingLimitRight = lp.rightMargin; 3583 3584 mSuggestionListView = (ListView) mContentView.findViewById( 3585 com.android.internal.R.id.suggestionContainer); 3586 3587 mSuggestionsAdapter = new SuggestionAdapter(); 3588 mSuggestionListView.setAdapter(mSuggestionsAdapter); 3589 mSuggestionListView.setOnItemClickListener(this); 3590 3591 // Inflate the suggestion items once and for all. 3592 mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS]; 3593 for (int i = 0; i < mSuggestionInfos.length; i++) { 3594 mSuggestionInfos[i] = new SuggestionInfo(); 3595 } 3596 3597 mAddToDictionaryButton = (TextView) mContentView.findViewById( 3598 com.android.internal.R.id.addToDictionaryButton); 3599 mAddToDictionaryButton.setOnClickListener(new View.OnClickListener() { 3600 public void onClick(View v) { 3601 final SuggestionSpan misspelledSpan = 3602 findEquivalentSuggestionSpan(mMisspelledSpanInfo); 3603 if (misspelledSpan == null) { 3604 // Span has been removed. 3605 return; 3606 } 3607 final Editable editable = (Editable) mTextView.getText(); 3608 final int spanStart = editable.getSpanStart(misspelledSpan); 3609 final int spanEnd = editable.getSpanEnd(misspelledSpan); 3610 if (spanStart < 0 || spanEnd <= spanStart) { 3611 return; 3612 } 3613 final String originalText = TextUtils.substring(editable, spanStart, spanEnd); 3614 3615 final Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT); 3616 intent.putExtra(USER_DICTIONARY_EXTRA_WORD, originalText); 3617 intent.putExtra(USER_DICTIONARY_EXTRA_LOCALE, 3618 mTextView.getTextServicesLocale().toString()); 3619 intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK); 3620 mTextView.getContext().startActivity(intent); 3621 // There is no way to know if the word was indeed added. Re-check. 3622 // TODO The ExtractEditText should remove the span in the original text instead 3623 editable.removeSpan(mMisspelledSpanInfo.mSuggestionSpan); 3624 Selection.setSelection(editable, spanEnd); 3625 updateSpellCheckSpans(spanStart, spanEnd, false); 3626 hideWithCleanUp(); 3627 } 3628 }); 3629 3630 mDeleteButton = (TextView) mContentView.findViewById( 3631 com.android.internal.R.id.deleteButton); 3632 mDeleteButton.setOnClickListener(new View.OnClickListener() { 3633 public void onClick(View v) { 3634 final Editable editable = (Editable) mTextView.getText(); 3635 3636 final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan); 3637 int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan); 3638 if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) { 3639 // Do not leave two adjacent spaces after deletion, or one at beginning of 3640 // text 3641 if (spanUnionEnd < editable.length() 3642 && Character.isSpaceChar(editable.charAt(spanUnionEnd)) 3643 && (spanUnionStart == 0 3644 || Character.isSpaceChar( 3645 editable.charAt(spanUnionStart - 1)))) { 3646 spanUnionEnd = spanUnionEnd + 1; 3647 } 3648 mTextView.deleteText_internal(spanUnionStart, spanUnionEnd); 3649 } 3650 hideWithCleanUp(); 3651 } 3652 }); 3653 3654 } 3655 3656 public boolean isShowingUp() { 3657 return mIsShowingUp; 3658 } 3659 3660 public void onParentLostFocus() { 3661 mIsShowingUp = false; 3662 } 3663 3664 private class SuggestionAdapter extends BaseAdapter { 3665 private LayoutInflater mInflater = (LayoutInflater) mContext.getSystemService( 3666 Context.LAYOUT_INFLATER_SERVICE); 3667 3668 @Override 3669 public int getCount() { 3670 return mNumberOfSuggestions; 3671 } 3672 3673 @Override 3674 public Object getItem(int position) { 3675 return mSuggestionInfos[position]; 3676 } 3677 3678 @Override 3679 public long getItemId(int position) { 3680 return position; 3681 } 3682 3683 @Override 3684 public View getView(int position, View convertView, ViewGroup parent) { 3685 TextView textView = (TextView) convertView; 3686 3687 if (textView == null) { 3688 textView = (TextView) mInflater.inflate(mTextView.mTextEditSuggestionItemLayout, 3689 parent, false); 3690 } 3691 3692 final SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3693 textView.setText(suggestionInfo.mText); 3694 return textView; 3695 } 3696 } 3697 3698 @VisibleForTesting 3699 public ViewGroup getContentViewForTesting() { 3700 return mContentView; 3701 } 3702 3703 @Override 3704 public void show() { 3705 if (!(mTextView.getText() instanceof Editable)) return; 3706 if (extractedTextModeWillBeStarted()) { 3707 return; 3708 } 3709 3710 if (updateSuggestions()) { 3711 mCursorWasVisibleBeforeSuggestions = mCursorVisible; 3712 mTextView.setCursorVisible(false); 3713 mIsShowingUp = true; 3714 super.show(); 3715 } 3716 3717 mSuggestionListView.setVisibility(mNumberOfSuggestions == 0 ? View.GONE : View.VISIBLE); 3718 } 3719 3720 @Override 3721 protected void measureContent() { 3722 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3723 final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec( 3724 displayMetrics.widthPixels, View.MeasureSpec.AT_MOST); 3725 final int verticalMeasure = View.MeasureSpec.makeMeasureSpec( 3726 displayMetrics.heightPixels, View.MeasureSpec.AT_MOST); 3727 3728 int width = 0; 3729 View view = null; 3730 for (int i = 0; i < mNumberOfSuggestions; i++) { 3731 view = mSuggestionsAdapter.getView(i, view, mContentView); 3732 view.getLayoutParams().width = LayoutParams.WRAP_CONTENT; 3733 view.measure(horizontalMeasure, verticalMeasure); 3734 width = Math.max(width, view.getMeasuredWidth()); 3735 } 3736 3737 if (mAddToDictionaryButton.getVisibility() != View.GONE) { 3738 mAddToDictionaryButton.measure(horizontalMeasure, verticalMeasure); 3739 width = Math.max(width, mAddToDictionaryButton.getMeasuredWidth()); 3740 } 3741 3742 mDeleteButton.measure(horizontalMeasure, verticalMeasure); 3743 width = Math.max(width, mDeleteButton.getMeasuredWidth()); 3744 3745 width += mContainerView.getPaddingLeft() + mContainerView.getPaddingRight() 3746 + mContainerMarginWidth; 3747 3748 // Enforce the width based on actual text widths 3749 mContentView.measure( 3750 View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY), 3751 verticalMeasure); 3752 3753 Drawable popupBackground = mPopupWindow.getBackground(); 3754 if (popupBackground != null) { 3755 if (mTempRect == null) mTempRect = new Rect(); 3756 popupBackground.getPadding(mTempRect); 3757 width += mTempRect.left + mTempRect.right; 3758 } 3759 mPopupWindow.setWidth(width); 3760 } 3761 3762 @Override 3763 protected int getTextOffset() { 3764 return (mTextView.getSelectionStart() + mTextView.getSelectionStart()) / 2; 3765 } 3766 3767 @Override 3768 protected int getVerticalLocalPosition(int line) { 3769 final Layout layout = mTextView.getLayout(); 3770 return layout.getLineBottomWithoutSpacing(line) - mContainerMarginTop; 3771 } 3772 3773 @Override 3774 protected int clipVertically(int positionY) { 3775 final int height = mContentView.getMeasuredHeight(); 3776 final DisplayMetrics displayMetrics = mTextView.getResources().getDisplayMetrics(); 3777 return Math.min(positionY, displayMetrics.heightPixels - height); 3778 } 3779 3780 private void hideWithCleanUp() { 3781 for (final SuggestionInfo info : mSuggestionInfos) { 3782 info.clear(); 3783 } 3784 mMisspelledSpanInfo.clear(); 3785 hide(); 3786 } 3787 3788 private boolean updateSuggestions() { 3789 Spannable spannable = (Spannable) mTextView.getText(); 3790 mNumberOfSuggestions = 3791 mSuggestionHelper.getSuggestionInfo(mSuggestionInfos, mMisspelledSpanInfo); 3792 if (mNumberOfSuggestions == 0 && mMisspelledSpanInfo.mSuggestionSpan == null) { 3793 return false; 3794 } 3795 3796 int spanUnionStart = mTextView.getText().length(); 3797 int spanUnionEnd = 0; 3798 3799 for (int i = 0; i < mNumberOfSuggestions; i++) { 3800 final SuggestionSpanInfo spanInfo = mSuggestionInfos[i].mSuggestionSpanInfo; 3801 spanUnionStart = Math.min(spanUnionStart, spanInfo.mSpanStart); 3802 spanUnionEnd = Math.max(spanUnionEnd, spanInfo.mSpanEnd); 3803 } 3804 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3805 spanUnionStart = Math.min(spanUnionStart, mMisspelledSpanInfo.mSpanStart); 3806 spanUnionEnd = Math.max(spanUnionEnd, mMisspelledSpanInfo.mSpanEnd); 3807 } 3808 3809 for (int i = 0; i < mNumberOfSuggestions; i++) { 3810 highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd); 3811 } 3812 3813 // Make "Add to dictionary" item visible if there is a span with the misspelled flag 3814 int addToDictionaryButtonVisibility = View.GONE; 3815 if (mMisspelledSpanInfo.mSuggestionSpan != null) { 3816 if (mMisspelledSpanInfo.mSpanStart >= 0 3817 && mMisspelledSpanInfo.mSpanEnd > mMisspelledSpanInfo.mSpanStart) { 3818 addToDictionaryButtonVisibility = View.VISIBLE; 3819 } 3820 } 3821 mAddToDictionaryButton.setVisibility(addToDictionaryButtonVisibility); 3822 3823 if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan(); 3824 final int underlineColor; 3825 if (mNumberOfSuggestions != 0) { 3826 underlineColor = 3827 mSuggestionInfos[0].mSuggestionSpanInfo.mSuggestionSpan.getUnderlineColor(); 3828 } else { 3829 underlineColor = mMisspelledSpanInfo.mSuggestionSpan.getUnderlineColor(); 3830 } 3831 3832 if (underlineColor == 0) { 3833 // Fallback on the default highlight color when the first span does not provide one 3834 mSuggestionRangeSpan.setBackgroundColor(mTextView.mHighlightColor); 3835 } else { 3836 final float BACKGROUND_TRANSPARENCY = 0.4f; 3837 final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY); 3838 mSuggestionRangeSpan.setBackgroundColor( 3839 (underlineColor & 0x00FFFFFF) + (newAlpha << 24)); 3840 } 3841 spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd, 3842 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3843 3844 mSuggestionsAdapter.notifyDataSetChanged(); 3845 return true; 3846 } 3847 3848 private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart, 3849 int unionEnd) { 3850 final Spannable text = (Spannable) mTextView.getText(); 3851 final int spanStart = suggestionInfo.mSuggestionSpanInfo.mSpanStart; 3852 final int spanEnd = suggestionInfo.mSuggestionSpanInfo.mSpanEnd; 3853 3854 // Adjust the start/end of the suggestion span 3855 suggestionInfo.mSuggestionStart = spanStart - unionStart; 3856 suggestionInfo.mSuggestionEnd = suggestionInfo.mSuggestionStart 3857 + suggestionInfo.mText.length(); 3858 3859 suggestionInfo.mText.setSpan(mHighlightSpan, 0, suggestionInfo.mText.length(), 3860 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 3861 3862 // Add the text before and after the span. 3863 final String textAsString = text.toString(); 3864 suggestionInfo.mText.insert(0, textAsString.substring(unionStart, spanStart)); 3865 suggestionInfo.mText.append(textAsString.substring(spanEnd, unionEnd)); 3866 } 3867 3868 @Override 3869 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 3870 SuggestionInfo suggestionInfo = mSuggestionInfos[position]; 3871 replaceWithSuggestion(suggestionInfo); 3872 hideWithCleanUp(); 3873 } 3874 } 3875 3876 /** 3877 * An ActionMode Callback class that is used to provide actions while in text insertion or 3878 * selection mode. 3879 * 3880 * The default callback provides a subset of Select All, Cut, Copy, Paste, Share and Replace 3881 * actions, depending on which of these this TextView supports and the current selection. 3882 */ 3883 private class TextActionModeCallback extends ActionMode.Callback2 { 3884 private final Path mSelectionPath = new Path(); 3885 private final RectF mSelectionBounds = new RectF(); 3886 private final boolean mHasSelection; 3887 private final int mHandleHeight; 3888 private final Map<MenuItem, OnClickListener> mAssistClickHandlers = new HashMap<>(); 3889 3890 TextActionModeCallback(@TextActionMode int mode) { 3891 mHasSelection = mode == TextActionMode.SELECTION 3892 || (mTextIsSelectable && mode == TextActionMode.TEXT_LINK); 3893 if (mHasSelection) { 3894 SelectionModifierCursorController selectionController = getSelectionController(); 3895 if (selectionController.mStartHandle == null) { 3896 // As these are for initializing selectionController, hide() must be called. 3897 selectionController.initDrawables(); 3898 selectionController.initHandles(); 3899 selectionController.hide(); 3900 } 3901 mHandleHeight = Math.max( 3902 mSelectHandleLeft.getMinimumHeight(), 3903 mSelectHandleRight.getMinimumHeight()); 3904 } else { 3905 InsertionPointCursorController insertionController = getInsertionController(); 3906 if (insertionController != null) { 3907 insertionController.getHandle(); 3908 mHandleHeight = mSelectHandleCenter.getMinimumHeight(); 3909 } else { 3910 mHandleHeight = 0; 3911 } 3912 } 3913 } 3914 3915 @Override 3916 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 3917 mAssistClickHandlers.clear(); 3918 3919 mode.setTitle(null); 3920 mode.setSubtitle(null); 3921 mode.setTitleOptionalHint(true); 3922 populateMenuWithItems(menu); 3923 3924 Callback customCallback = getCustomCallback(); 3925 if (customCallback != null) { 3926 if (!customCallback.onCreateActionMode(mode, menu)) { 3927 // The custom mode can choose to cancel the action mode, dismiss selection. 3928 Selection.setSelection((Spannable) mTextView.getText(), 3929 mTextView.getSelectionEnd()); 3930 return false; 3931 } 3932 } 3933 3934 if (mTextView.canProcessText()) { 3935 mProcessTextIntentActionsHandler.onInitializeMenu(menu); 3936 } 3937 3938 if (mHasSelection && !mTextView.hasTransientState()) { 3939 mTextView.setHasTransientState(true); 3940 } 3941 return true; 3942 } 3943 3944 private Callback getCustomCallback() { 3945 return mHasSelection 3946 ? mCustomSelectionActionModeCallback 3947 : mCustomInsertionActionModeCallback; 3948 } 3949 3950 private void populateMenuWithItems(Menu menu) { 3951 if (mTextView.canCut()) { 3952 menu.add(Menu.NONE, TextView.ID_CUT, MENU_ITEM_ORDER_CUT, 3953 com.android.internal.R.string.cut) 3954 .setAlphabeticShortcut('x') 3955 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3956 } 3957 3958 if (mTextView.canCopy()) { 3959 menu.add(Menu.NONE, TextView.ID_COPY, MENU_ITEM_ORDER_COPY, 3960 com.android.internal.R.string.copy) 3961 .setAlphabeticShortcut('c') 3962 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3963 } 3964 3965 if (mTextView.canPaste()) { 3966 menu.add(Menu.NONE, TextView.ID_PASTE, MENU_ITEM_ORDER_PASTE, 3967 com.android.internal.R.string.paste) 3968 .setAlphabeticShortcut('v') 3969 .setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 3970 } 3971 3972 if (mTextView.canShare()) { 3973 menu.add(Menu.NONE, TextView.ID_SHARE, MENU_ITEM_ORDER_SHARE, 3974 com.android.internal.R.string.share) 3975 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3976 } 3977 3978 if (mTextView.canRequestAutofill()) { 3979 final String selected = mTextView.getSelectedText(); 3980 if (selected == null || selected.isEmpty()) { 3981 menu.add(Menu.NONE, TextView.ID_AUTOFILL, MENU_ITEM_ORDER_AUTOFILL, 3982 com.android.internal.R.string.autofill) 3983 .setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER); 3984 } 3985 } 3986 3987 if (mTextView.canPasteAsPlainText()) { 3988 menu.add( 3989 Menu.NONE, 3990 TextView.ID_PASTE_AS_PLAIN_TEXT, 3991 MENU_ITEM_ORDER_PASTE_AS_PLAIN_TEXT, 3992 com.android.internal.R.string.paste_as_plain_text) 3993 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 3994 } 3995 3996 updateSelectAllItem(menu); 3997 updateReplaceItem(menu); 3998 updateAssistMenuItems(menu); 3999 } 4000 4001 @Override 4002 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 4003 updateSelectAllItem(menu); 4004 updateReplaceItem(menu); 4005 updateAssistMenuItems(menu); 4006 4007 Callback customCallback = getCustomCallback(); 4008 if (customCallback != null) { 4009 return customCallback.onPrepareActionMode(mode, menu); 4010 } 4011 return true; 4012 } 4013 4014 private void updateSelectAllItem(Menu menu) { 4015 boolean canSelectAll = mTextView.canSelectAllText(); 4016 boolean selectAllItemExists = menu.findItem(TextView.ID_SELECT_ALL) != null; 4017 if (canSelectAll && !selectAllItemExists) { 4018 menu.add(Menu.NONE, TextView.ID_SELECT_ALL, MENU_ITEM_ORDER_SELECT_ALL, 4019 com.android.internal.R.string.selectAll) 4020 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 4021 } else if (!canSelectAll && selectAllItemExists) { 4022 menu.removeItem(TextView.ID_SELECT_ALL); 4023 } 4024 } 4025 4026 private void updateReplaceItem(Menu menu) { 4027 boolean canReplace = mTextView.isSuggestionsEnabled() && shouldOfferToShowSuggestions(); 4028 boolean replaceItemExists = menu.findItem(TextView.ID_REPLACE) != null; 4029 if (canReplace && !replaceItemExists) { 4030 menu.add(Menu.NONE, TextView.ID_REPLACE, MENU_ITEM_ORDER_REPLACE, 4031 com.android.internal.R.string.replace) 4032 .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); 4033 } else if (!canReplace && replaceItemExists) { 4034 menu.removeItem(TextView.ID_REPLACE); 4035 } 4036 } 4037 4038 private void updateAssistMenuItems(Menu menu) { 4039 clearAssistMenuItems(menu); 4040 if (!shouldEnableAssistMenuItems()) { 4041 return; 4042 } 4043 final TextClassification textClassification = 4044 getSelectionActionModeHelper().getTextClassification(); 4045 if (textClassification == null) { 4046 return; 4047 } 4048 final OnClickListener onClick = getSupportedOnClickListener( 4049 textClassification.getIcon(), 4050 textClassification.getLabel(), 4051 textClassification.getIntent()); 4052 if (onClick != null) { 4053 final MenuItem item = menu.add( 4054 TextView.ID_ASSIST, TextView.ID_ASSIST, MENU_ITEM_ORDER_ASSIST, 4055 textClassification.getLabel()) 4056 .setIcon(textClassification.getIcon()) 4057 .setIntent(textClassification.getIntent()); 4058 item.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 4059 mAssistClickHandlers.put( 4060 item, TextClassification.createIntentOnClickListener( 4061 mTextView.getContext(), textClassification.getIntent())); 4062 } 4063 final int count = textClassification.getSecondaryActionsCount(); 4064 for (int i = 0; i < count; i++) { 4065 final OnClickListener onClick1 = getSupportedOnClickListener( 4066 textClassification.getSecondaryIcon(i), 4067 textClassification.getSecondaryLabel(i), 4068 textClassification.getSecondaryIntent(i)); 4069 if (onClick1 == null) { 4070 continue; 4071 } 4072 final int order = MENU_ITEM_ORDER_SECONDARY_ASSIST_ACTIONS_START + i; 4073 final MenuItem item = menu.add( 4074 TextView.ID_ASSIST, Menu.NONE, order, 4075 textClassification.getSecondaryLabel(i)) 4076 .setIcon(textClassification.getSecondaryIcon(i)) 4077 .setIntent(textClassification.getSecondaryIntent(i)); 4078 item.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER); 4079 mAssistClickHandlers.put(item, 4080 TextClassification.createIntentOnClickListener( 4081 mTextView.getContext(), textClassification.getSecondaryIntent(i))); 4082 } 4083 } 4084 4085 private void clearAssistMenuItems(Menu menu) { 4086 int i = 0; 4087 while (i < menu.size()) { 4088 final MenuItem menuItem = menu.getItem(i); 4089 if (menuItem.getGroupId() == TextView.ID_ASSIST) { 4090 menu.removeItem(menuItem.getItemId()); 4091 continue; 4092 } 4093 i++; 4094 } 4095 } 4096 4097 @Nullable 4098 private OnClickListener getSupportedOnClickListener( 4099 Drawable icon, CharSequence label, Intent intent) { 4100 final boolean hasUi = icon != null || !TextUtils.isEmpty(label); 4101 if (hasUi) { 4102 return TextClassification.createIntentOnClickListener( 4103 mTextView.getContext(), intent); 4104 } 4105 return null; 4106 } 4107 4108 private boolean onAssistMenuItemClicked(MenuItem assistMenuItem) { 4109 Preconditions.checkArgument(assistMenuItem.getGroupId() == TextView.ID_ASSIST); 4110 4111 final TextClassification textClassification = 4112 getSelectionActionModeHelper().getTextClassification(); 4113 if (!shouldEnableAssistMenuItems() || textClassification == null) { 4114 // No textClassification result to handle the click. Eat the click. 4115 return true; 4116 } 4117 4118 OnClickListener onClickListener = mAssistClickHandlers.get(assistMenuItem); 4119 if (onClickListener == null) { 4120 final Intent intent = assistMenuItem.getIntent(); 4121 if (intent != null) { 4122 onClickListener = TextClassification.createIntentOnClickListener( 4123 mTextView.getContext(), intent); 4124 } 4125 } 4126 if (onClickListener != null) { 4127 onClickListener.onClick(mTextView); 4128 stopTextActionMode(); 4129 } 4130 // We tried our best. 4131 return true; 4132 } 4133 4134 private boolean shouldEnableAssistMenuItems() { 4135 return mTextView.isDeviceProvisioned() 4136 && TextClassificationManager.getSettings(mTextView.getContext()) 4137 .isSmartTextShareEnabled(); 4138 } 4139 4140 @Override 4141 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 4142 getSelectionActionModeHelper().onSelectionAction(item.getItemId()); 4143 4144 if (mProcessTextIntentActionsHandler.performMenuItemAction(item)) { 4145 return true; 4146 } 4147 Callback customCallback = getCustomCallback(); 4148 if (customCallback != null && customCallback.onActionItemClicked(mode, item)) { 4149 return true; 4150 } 4151 if (item.getGroupId() == TextView.ID_ASSIST && onAssistMenuItemClicked(item)) { 4152 return true; 4153 } 4154 return mTextView.onTextContextMenuItem(item.getItemId()); 4155 } 4156 4157 @Override 4158 public void onDestroyActionMode(ActionMode mode) { 4159 // Clear mTextActionMode not to recursively destroy action mode by clearing selection. 4160 getSelectionActionModeHelper().onDestroyActionMode(); 4161 mTextActionMode = null; 4162 Callback customCallback = getCustomCallback(); 4163 if (customCallback != null) { 4164 customCallback.onDestroyActionMode(mode); 4165 } 4166 4167 if (!mPreserveSelection) { 4168 /* 4169 * Leave current selection when we tentatively destroy action mode for the 4170 * selection. If we're detaching from a window, we'll bring back the selection 4171 * mode when (if) we get reattached. 4172 */ 4173 Selection.setSelection((Spannable) mTextView.getText(), 4174 mTextView.getSelectionEnd()); 4175 } 4176 4177 if (mSelectionModifierCursorController != null) { 4178 mSelectionModifierCursorController.hide(); 4179 } 4180 4181 mAssistClickHandlers.clear(); 4182 mRequestingLinkActionMode = false; 4183 } 4184 4185 @Override 4186 public void onGetContentRect(ActionMode mode, View view, Rect outRect) { 4187 if (!view.equals(mTextView) || mTextView.getLayout() == null) { 4188 super.onGetContentRect(mode, view, outRect); 4189 return; 4190 } 4191 if (mTextView.getSelectionStart() != mTextView.getSelectionEnd()) { 4192 // We have a selection. 4193 mSelectionPath.reset(); 4194 mTextView.getLayout().getSelectionPath( 4195 mTextView.getSelectionStart(), mTextView.getSelectionEnd(), mSelectionPath); 4196 mSelectionPath.computeBounds(mSelectionBounds, true); 4197 mSelectionBounds.bottom += mHandleHeight; 4198 } else { 4199 // We have a cursor. 4200 Layout layout = mTextView.getLayout(); 4201 int line = layout.getLineForOffset(mTextView.getSelectionStart()); 4202 float primaryHorizontal = clampHorizontalPosition(null, 4203 layout.getPrimaryHorizontal(mTextView.getSelectionStart())); 4204 mSelectionBounds.set( 4205 primaryHorizontal, 4206 layout.getLineTop(line), 4207 primaryHorizontal, 4208 layout.getLineBottom(line) + mHandleHeight); 4209 } 4210 // Take TextView's padding and scroll into account. 4211 int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset(); 4212 int textVerticalOffset = mTextView.viewportToContentVerticalOffset(); 4213 outRect.set( 4214 (int) Math.floor(mSelectionBounds.left + textHorizontalOffset), 4215 (int) Math.floor(mSelectionBounds.top + textVerticalOffset), 4216 (int) Math.ceil(mSelectionBounds.right + textHorizontalOffset), 4217 (int) Math.ceil(mSelectionBounds.bottom + textVerticalOffset)); 4218 } 4219 } 4220 4221 /** 4222 * A listener to call {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)} 4223 * while the input method is requesting the cursor/anchor position. Does nothing as long as 4224 * {@link InputMethodManager#isWatchingCursor(View)} returns false. 4225 */ 4226 private final class CursorAnchorInfoNotifier implements TextViewPositionListener { 4227 final CursorAnchorInfo.Builder mSelectionInfoBuilder = new CursorAnchorInfo.Builder(); 4228 final int[] mTmpIntOffset = new int[2]; 4229 final Matrix mViewToScreenMatrix = new Matrix(); 4230 4231 @Override 4232 public void updatePosition(int parentPositionX, int parentPositionY, 4233 boolean parentPositionChanged, boolean parentScrolled) { 4234 final InputMethodState ims = mInputMethodState; 4235 if (ims == null || ims.mBatchEditNesting > 0) { 4236 return; 4237 } 4238 final InputMethodManager imm = InputMethodManager.peekInstance(); 4239 if (null == imm) { 4240 return; 4241 } 4242 if (!imm.isActive(mTextView)) { 4243 return; 4244 } 4245 // Skip if the IME has not requested the cursor/anchor position. 4246 if (!imm.isCursorAnchorInfoEnabled()) { 4247 return; 4248 } 4249 Layout layout = mTextView.getLayout(); 4250 if (layout == null) { 4251 return; 4252 } 4253 4254 final CursorAnchorInfo.Builder builder = mSelectionInfoBuilder; 4255 builder.reset(); 4256 4257 final int selectionStart = mTextView.getSelectionStart(); 4258 builder.setSelectionRange(selectionStart, mTextView.getSelectionEnd()); 4259 4260 // Construct transformation matrix from view local coordinates to screen coordinates. 4261 mViewToScreenMatrix.set(mTextView.getMatrix()); 4262 mTextView.getLocationOnScreen(mTmpIntOffset); 4263 mViewToScreenMatrix.postTranslate(mTmpIntOffset[0], mTmpIntOffset[1]); 4264 builder.setMatrix(mViewToScreenMatrix); 4265 4266 final float viewportToContentHorizontalOffset = 4267 mTextView.viewportToContentHorizontalOffset(); 4268 final float viewportToContentVerticalOffset = 4269 mTextView.viewportToContentVerticalOffset(); 4270 4271 final CharSequence text = mTextView.getText(); 4272 if (text instanceof Spannable) { 4273 final Spannable sp = (Spannable) text; 4274 int composingTextStart = EditableInputConnection.getComposingSpanStart(sp); 4275 int composingTextEnd = EditableInputConnection.getComposingSpanEnd(sp); 4276 if (composingTextEnd < composingTextStart) { 4277 final int temp = composingTextEnd; 4278 composingTextEnd = composingTextStart; 4279 composingTextStart = temp; 4280 } 4281 final boolean hasComposingText = 4282 (0 <= composingTextStart) && (composingTextStart < composingTextEnd); 4283 if (hasComposingText) { 4284 final CharSequence composingText = text.subSequence(composingTextStart, 4285 composingTextEnd); 4286 builder.setComposingText(composingTextStart, composingText); 4287 mTextView.populateCharacterBounds(builder, composingTextStart, 4288 composingTextEnd, viewportToContentHorizontalOffset, 4289 viewportToContentVerticalOffset); 4290 } 4291 } 4292 4293 // Treat selectionStart as the insertion point. 4294 if (0 <= selectionStart) { 4295 final int offset = selectionStart; 4296 final int line = layout.getLineForOffset(offset); 4297 final float insertionMarkerX = layout.getPrimaryHorizontal(offset) 4298 + viewportToContentHorizontalOffset; 4299 final float insertionMarkerTop = layout.getLineTop(line) 4300 + viewportToContentVerticalOffset; 4301 final float insertionMarkerBaseline = layout.getLineBaseline(line) 4302 + viewportToContentVerticalOffset; 4303 final float insertionMarkerBottom = layout.getLineBottomWithoutSpacing(line) 4304 + viewportToContentVerticalOffset; 4305 final boolean isTopVisible = mTextView 4306 .isPositionVisible(insertionMarkerX, insertionMarkerTop); 4307 final boolean isBottomVisible = mTextView 4308 .isPositionVisible(insertionMarkerX, insertionMarkerBottom); 4309 int insertionMarkerFlags = 0; 4310 if (isTopVisible || isBottomVisible) { 4311 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION; 4312 } 4313 if (!isTopVisible || !isBottomVisible) { 4314 insertionMarkerFlags |= CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION; 4315 } 4316 if (layout.isRtlCharAt(offset)) { 4317 insertionMarkerFlags |= CursorAnchorInfo.FLAG_IS_RTL; 4318 } 4319 builder.setInsertionMarkerLocation(insertionMarkerX, insertionMarkerTop, 4320 insertionMarkerBaseline, insertionMarkerBottom, insertionMarkerFlags); 4321 } 4322 4323 imm.updateCursorAnchorInfo(mTextView, builder.build()); 4324 } 4325 } 4326 4327 private static class MagnifierMotionAnimator { 4328 private static final long DURATION = 100 /* miliseconds */; 4329 4330 // The magnifier being animated. 4331 private final Magnifier mMagnifier; 4332 // A value animator used to animate the magnifier. 4333 private final ValueAnimator mAnimator; 4334 4335 // Whether the magnifier is currently visible. 4336 private boolean mMagnifierIsShowing; 4337 // The coordinates of the magnifier when the currently running animation started. 4338 private float mAnimationStartX; 4339 private float mAnimationStartY; 4340 // The coordinates of the magnifier in the latest animation frame. 4341 private float mAnimationCurrentX; 4342 private float mAnimationCurrentY; 4343 // The latest coordinates the motion animator was asked to #show() the magnifier at. 4344 private float mLastX; 4345 private float mLastY; 4346 4347 private MagnifierMotionAnimator(final Magnifier magnifier) { 4348 mMagnifier = magnifier; 4349 // Prepare the animator used to run the motion animation. 4350 mAnimator = ValueAnimator.ofFloat(0, 1); 4351 mAnimator.setDuration(DURATION); 4352 mAnimator.setInterpolator(new LinearInterpolator()); 4353 mAnimator.addUpdateListener((animation) -> { 4354 // Interpolate to find the current position of the magnifier. 4355 mAnimationCurrentX = mAnimationStartX 4356 + (mLastX - mAnimationStartX) * animation.getAnimatedFraction(); 4357 mAnimationCurrentY = mAnimationStartY 4358 + (mLastY - mAnimationStartY) * animation.getAnimatedFraction(); 4359 mMagnifier.show(mAnimationCurrentX, mAnimationCurrentY); 4360 }); 4361 } 4362 4363 /** 4364 * Shows the magnifier at a new position. 4365 * If the y coordinate is different from the previous y coordinate 4366 * (probably corresponding to a line jump in the text), a short 4367 * animation is added to the jump. 4368 */ 4369 private void show(final float x, final float y) { 4370 final boolean startNewAnimation = mMagnifierIsShowing && y != mLastY; 4371 4372 if (startNewAnimation) { 4373 if (mAnimator.isRunning()) { 4374 mAnimator.cancel(); 4375 mAnimationStartX = mAnimationCurrentX; 4376 mAnimationStartY = mAnimationCurrentY; 4377 } else { 4378 mAnimationStartX = mLastX; 4379 mAnimationStartY = mLastY; 4380 } 4381 mAnimator.start(); 4382 } else { 4383 if (!mAnimator.isRunning()) { 4384 mMagnifier.show(x, y); 4385 } 4386 } 4387 mLastX = x; 4388 mLastY = y; 4389 mMagnifierIsShowing = true; 4390 } 4391 4392 /** 4393 * Updates the content of the magnifier. 4394 */ 4395 private void update() { 4396 mMagnifier.update(); 4397 } 4398 4399 /** 4400 * Dismisses the magnifier, or does nothing if it is already dismissed. 4401 */ 4402 private void dismiss() { 4403 mMagnifier.dismiss(); 4404 mAnimator.cancel(); 4405 mMagnifierIsShowing = false; 4406 } 4407 } 4408 4409 @VisibleForTesting 4410 public abstract class HandleView extends View implements TextViewPositionListener { 4411 protected Drawable mDrawable; 4412 protected Drawable mDrawableLtr; 4413 protected Drawable mDrawableRtl; 4414 private final PopupWindow mContainer; 4415 // Position with respect to the parent TextView 4416 private int mPositionX, mPositionY; 4417 private boolean mIsDragging; 4418 // Offset from touch position to mPosition 4419 private float mTouchToWindowOffsetX, mTouchToWindowOffsetY; 4420 protected int mHotspotX; 4421 protected int mHorizontalGravity; 4422 // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up 4423 private float mTouchOffsetY; 4424 // Where the touch position should be on the handle to ensure a maximum cursor visibility 4425 private float mIdealVerticalOffset; 4426 // Parent's (TextView) previous position in window 4427 private int mLastParentX, mLastParentY; 4428 // Parent's (TextView) previous position on screen 4429 private int mLastParentXOnScreen, mLastParentYOnScreen; 4430 // Previous text character offset 4431 protected int mPreviousOffset = -1; 4432 // Previous text character offset 4433 private boolean mPositionHasChanged = true; 4434 // Minimum touch target size for handles 4435 private int mMinSize; 4436 // Indicates the line of text that the handle is on. 4437 protected int mPrevLine = UNSET_LINE; 4438 // Indicates the line of text that the user was touching. This can differ from mPrevLine 4439 // when selecting text when the handles jump to the end / start of words which may be on 4440 // a different line. 4441 protected int mPreviousLineTouched = UNSET_LINE; 4442 4443 private HandleView(Drawable drawableLtr, Drawable drawableRtl, final int id) { 4444 super(mTextView.getContext()); 4445 setId(id); 4446 mContainer = new PopupWindow(mTextView.getContext(), null, 4447 com.android.internal.R.attr.textSelectHandleWindowStyle); 4448 mContainer.setSplitTouchEnabled(true); 4449 mContainer.setClippingEnabled(false); 4450 mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL); 4451 mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT); 4452 mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); 4453 mContainer.setContentView(this); 4454 4455 mDrawableLtr = drawableLtr; 4456 mDrawableRtl = drawableRtl; 4457 mMinSize = mTextView.getContext().getResources().getDimensionPixelSize( 4458 com.android.internal.R.dimen.text_handle_min_size); 4459 4460 updateDrawable(); 4461 4462 final int handleHeight = getPreferredHeight(); 4463 mTouchOffsetY = -0.3f * handleHeight; 4464 mIdealVerticalOffset = 0.7f * handleHeight; 4465 } 4466 4467 public float getIdealVerticalOffset() { 4468 return mIdealVerticalOffset; 4469 } 4470 4471 protected void updateDrawable() { 4472 if (mIsDragging) { 4473 // Don't update drawable during dragging. 4474 return; 4475 } 4476 final Layout layout = mTextView.getLayout(); 4477 if (layout == null) { 4478 return; 4479 } 4480 final int offset = getCurrentCursorOffset(); 4481 final boolean isRtlCharAtOffset = isAtRtlRun(layout, offset); 4482 final Drawable oldDrawable = mDrawable; 4483 mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr; 4484 mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset); 4485 mHorizontalGravity = getHorizontalGravity(isRtlCharAtOffset); 4486 if (oldDrawable != mDrawable && isShowing()) { 4487 // Update popup window position. 4488 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4489 - getHorizontalOffset() + getCursorOffset(); 4490 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4491 mPositionHasChanged = true; 4492 updatePosition(mLastParentX, mLastParentY, false, false); 4493 postInvalidate(); 4494 } 4495 } 4496 4497 protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun); 4498 protected abstract int getHorizontalGravity(boolean isRtlRun); 4499 4500 // Touch-up filter: number of previous positions remembered 4501 private static final int HISTORY_SIZE = 5; 4502 private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150; 4503 private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350; 4504 private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE]; 4505 private final int[] mPreviousOffsets = new int[HISTORY_SIZE]; 4506 private int mPreviousOffsetIndex = 0; 4507 private int mNumberPreviousOffsets = 0; 4508 4509 private void startTouchUpFilter(int offset) { 4510 mNumberPreviousOffsets = 0; 4511 addPositionToTouchUpFilter(offset); 4512 } 4513 4514 private void addPositionToTouchUpFilter(int offset) { 4515 mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE; 4516 mPreviousOffsets[mPreviousOffsetIndex] = offset; 4517 mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis(); 4518 mNumberPreviousOffsets++; 4519 } 4520 4521 private void filterOnTouchUp(boolean fromTouchScreen) { 4522 final long now = SystemClock.uptimeMillis(); 4523 int i = 0; 4524 int index = mPreviousOffsetIndex; 4525 final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE); 4526 while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) { 4527 i++; 4528 index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE; 4529 } 4530 4531 if (i > 0 && i < iMax 4532 && (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) { 4533 positionAtCursorOffset(mPreviousOffsets[index], false, fromTouchScreen); 4534 } 4535 } 4536 4537 public boolean offsetHasBeenChanged() { 4538 return mNumberPreviousOffsets > 1; 4539 } 4540 4541 @Override 4542 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 4543 setMeasuredDimension(getPreferredWidth(), getPreferredHeight()); 4544 } 4545 4546 @Override 4547 public void invalidate() { 4548 super.invalidate(); 4549 if (isShowing()) { 4550 positionAtCursorOffset(getCurrentCursorOffset(), true, false); 4551 } 4552 }; 4553 4554 private int getPreferredWidth() { 4555 return Math.max(mDrawable.getIntrinsicWidth(), mMinSize); 4556 } 4557 4558 private int getPreferredHeight() { 4559 return Math.max(mDrawable.getIntrinsicHeight(), mMinSize); 4560 } 4561 4562 public void show() { 4563 if (isShowing()) return; 4564 4565 getPositionListener().addSubscriber(this, true /* local position may change */); 4566 4567 // Make sure the offset is always considered new, even when focusing at same position 4568 mPreviousOffset = -1; 4569 positionAtCursorOffset(getCurrentCursorOffset(), false, false); 4570 } 4571 4572 protected void dismiss() { 4573 mIsDragging = false; 4574 mContainer.dismiss(); 4575 onDetached(); 4576 } 4577 4578 public void hide() { 4579 dismiss(); 4580 4581 getPositionListener().removeSubscriber(this); 4582 } 4583 4584 public boolean isShowing() { 4585 return mContainer.isShowing(); 4586 } 4587 4588 private boolean isVisible() { 4589 // Always show a dragging handle. 4590 if (mIsDragging) { 4591 return true; 4592 } 4593 4594 if (mTextView.isInBatchEditMode()) { 4595 return false; 4596 } 4597 4598 return mTextView.isPositionVisible( 4599 mPositionX + mHotspotX + getHorizontalOffset(), mPositionY); 4600 } 4601 4602 public abstract int getCurrentCursorOffset(); 4603 4604 protected abstract void updateSelection(int offset); 4605 4606 protected abstract void updatePosition(float x, float y, boolean fromTouchScreen); 4607 4608 @MagnifierHandleTrigger 4609 protected abstract int getMagnifierHandleTrigger(); 4610 4611 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 4612 return layout.isRtlCharAt(offset); 4613 } 4614 4615 @VisibleForTesting 4616 public float getHorizontal(@NonNull Layout layout, int offset) { 4617 return layout.getPrimaryHorizontal(offset); 4618 } 4619 4620 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 4621 return mTextView.getOffsetAtCoordinate(line, x); 4622 } 4623 4624 /** 4625 * @param offset Cursor offset. Must be in [-1, length]. 4626 * @param forceUpdatePosition whether to force update the position. This should be true 4627 * when If the parent has been scrolled, for example. 4628 * @param fromTouchScreen {@code true} if the cursor is moved with motion events from the 4629 * touch screen. 4630 */ 4631 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition, 4632 boolean fromTouchScreen) { 4633 // A HandleView relies on the layout, which may be nulled by external methods 4634 Layout layout = mTextView.getLayout(); 4635 if (layout == null) { 4636 // Will update controllers' state, hiding them and stopping selection mode if needed 4637 prepareCursorControllers(); 4638 return; 4639 } 4640 layout = mTextView.getLayout(); 4641 4642 boolean offsetChanged = offset != mPreviousOffset; 4643 if (offsetChanged || forceUpdatePosition) { 4644 if (offsetChanged) { 4645 updateSelection(offset); 4646 if (fromTouchScreen && mHapticTextHandleEnabled) { 4647 mTextView.performHapticFeedback(HapticFeedbackConstants.TEXT_HANDLE_MOVE); 4648 } 4649 addPositionToTouchUpFilter(offset); 4650 } 4651 final int line = layout.getLineForOffset(offset); 4652 mPrevLine = line; 4653 4654 mPositionX = getCursorHorizontalPosition(layout, offset) - mHotspotX 4655 - getHorizontalOffset() + getCursorOffset(); 4656 mPositionY = layout.getLineBottomWithoutSpacing(line); 4657 4658 // Take TextView's padding and scroll into account. 4659 mPositionX += mTextView.viewportToContentHorizontalOffset(); 4660 mPositionY += mTextView.viewportToContentVerticalOffset(); 4661 4662 mPreviousOffset = offset; 4663 mPositionHasChanged = true; 4664 } 4665 } 4666 4667 /** 4668 * Return the clamped horizontal position for the cursor. 4669 * 4670 * @param layout Text layout. 4671 * @param offset Character offset for the cursor. 4672 * @return The clamped horizontal position for the cursor. 4673 */ 4674 int getCursorHorizontalPosition(Layout layout, int offset) { 4675 return (int) (getHorizontal(layout, offset) - 0.5f); 4676 } 4677 4678 @Override 4679 public void updatePosition(int parentPositionX, int parentPositionY, 4680 boolean parentPositionChanged, boolean parentScrolled) { 4681 positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled, false); 4682 if (parentPositionChanged || mPositionHasChanged) { 4683 if (mIsDragging) { 4684 // Update touchToWindow offset in case of parent scrolling while dragging 4685 if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) { 4686 mTouchToWindowOffsetX += parentPositionX - mLastParentX; 4687 mTouchToWindowOffsetY += parentPositionY - mLastParentY; 4688 mLastParentX = parentPositionX; 4689 mLastParentY = parentPositionY; 4690 } 4691 4692 onHandleMoved(); 4693 } 4694 4695 if (isVisible()) { 4696 // Transform to the window coordinates to follow the view tranformation. 4697 final int[] pts = { mPositionX + mHotspotX + getHorizontalOffset(), mPositionY}; 4698 mTextView.transformFromViewToWindowSpace(pts); 4699 pts[0] -= mHotspotX + getHorizontalOffset(); 4700 4701 if (isShowing()) { 4702 mContainer.update(pts[0], pts[1], -1, -1); 4703 } else { 4704 mContainer.showAtLocation(mTextView, Gravity.NO_GRAVITY, pts[0], pts[1]); 4705 } 4706 } else { 4707 if (isShowing()) { 4708 dismiss(); 4709 } 4710 } 4711 4712 mPositionHasChanged = false; 4713 } 4714 } 4715 4716 @Override 4717 protected void onDraw(Canvas c) { 4718 final int drawWidth = mDrawable.getIntrinsicWidth(); 4719 final int left = getHorizontalOffset(); 4720 4721 mDrawable.setBounds(left, 0, left + drawWidth, mDrawable.getIntrinsicHeight()); 4722 mDrawable.draw(c); 4723 } 4724 4725 private int getHorizontalOffset() { 4726 final int width = getPreferredWidth(); 4727 final int drawWidth = mDrawable.getIntrinsicWidth(); 4728 final int left; 4729 switch (mHorizontalGravity) { 4730 case Gravity.LEFT: 4731 left = 0; 4732 break; 4733 default: 4734 case Gravity.CENTER: 4735 left = (width - drawWidth) / 2; 4736 break; 4737 case Gravity.RIGHT: 4738 left = width - drawWidth; 4739 break; 4740 } 4741 return left; 4742 } 4743 4744 protected int getCursorOffset() { 4745 return 0; 4746 } 4747 4748 /** 4749 * Computes the position where the magnifier should be shown, relative to 4750 * {@code mTextView}, and writes them to {@code showPosInView}. Also decides 4751 * whether the magnifier should be shown or dismissed after this touch event. 4752 * @return Whether the magnifier should be shown at the computed coordinates or dismissed. 4753 */ 4754 private boolean obtainMagnifierShowCoordinates(@NonNull final MotionEvent event, 4755 final PointF showPosInView) { 4756 4757 final int trigger = getMagnifierHandleTrigger(); 4758 final int offset; 4759 final int otherHandleOffset; 4760 switch (trigger) { 4761 case MagnifierHandleTrigger.INSERTION: 4762 offset = mTextView.getSelectionStart(); 4763 otherHandleOffset = -1; 4764 break; 4765 case MagnifierHandleTrigger.SELECTION_START: 4766 offset = mTextView.getSelectionStart(); 4767 otherHandleOffset = mTextView.getSelectionEnd(); 4768 break; 4769 case MagnifierHandleTrigger.SELECTION_END: 4770 offset = mTextView.getSelectionEnd(); 4771 otherHandleOffset = mTextView.getSelectionStart(); 4772 break; 4773 default: 4774 offset = -1; 4775 otherHandleOffset = -1; 4776 break; 4777 } 4778 4779 if (offset == -1) { 4780 return false; 4781 } 4782 4783 final Layout layout = mTextView.getLayout(); 4784 final int lineNumber = layout.getLineForOffset(offset); 4785 // Compute whether the selection handles are currently on the same line, and, 4786 // in this particular case, whether the selected text is right to left. 4787 final boolean sameLineSelection = otherHandleOffset != -1 4788 && lineNumber == layout.getLineForOffset(otherHandleOffset); 4789 final boolean rtl = sameLineSelection 4790 && (offset < otherHandleOffset) 4791 != (getHorizontal(mTextView.getLayout(), offset) 4792 < getHorizontal(mTextView.getLayout(), otherHandleOffset)); 4793 4794 // Horizontally move the magnifier smoothly, clamp inside the current line / selection. 4795 final int[] textViewLocationOnScreen = new int[2]; 4796 mTextView.getLocationOnScreen(textViewLocationOnScreen); 4797 final float touchXInView = event.getRawX() - textViewLocationOnScreen[0]; 4798 float leftBound = mTextView.getTotalPaddingLeft() - mTextView.getScrollX(); 4799 float rightBound = mTextView.getTotalPaddingLeft() - mTextView.getScrollX(); 4800 if (sameLineSelection && ((trigger == MagnifierHandleTrigger.SELECTION_END) ^ rtl)) { 4801 leftBound += getHorizontal(mTextView.getLayout(), otherHandleOffset); 4802 } else { 4803 leftBound += mTextView.getLayout().getLineLeft(lineNumber); 4804 } 4805 if (sameLineSelection && ((trigger == MagnifierHandleTrigger.SELECTION_START) ^ rtl)) { 4806 rightBound += getHorizontal(mTextView.getLayout(), otherHandleOffset); 4807 } else { 4808 rightBound += mTextView.getLayout().getLineRight(lineNumber); 4809 } 4810 final float contentWidth = Math.round(mMagnifierAnimator.mMagnifier.getWidth() 4811 / mMagnifierAnimator.mMagnifier.getZoom()); 4812 if (touchXInView < leftBound - contentWidth / 2 4813 || touchXInView > rightBound + contentWidth / 2) { 4814 // The touch is too far from the current line / selection, so hide the magnifier. 4815 return false; 4816 } 4817 showPosInView.x = Math.max(leftBound, Math.min(rightBound, touchXInView)); 4818 4819 // Vertically snap to middle of current line. 4820 showPosInView.y = (mTextView.getLayout().getLineTop(lineNumber) 4821 + mTextView.getLayout().getLineBottom(lineNumber)) / 2.0f 4822 + mTextView.getTotalPaddingTop() - mTextView.getScrollY(); 4823 4824 return true; 4825 } 4826 4827 private boolean tooLargeTextForMagnifier() { 4828 final float magnifierContentHeight = Math.round( 4829 mMagnifierAnimator.mMagnifier.getHeight() 4830 / mMagnifierAnimator.mMagnifier.getZoom()); 4831 final Paint.FontMetrics fontMetrics = mTextView.getPaint().getFontMetrics(); 4832 final float glyphHeight = fontMetrics.descent - fontMetrics.ascent; 4833 return glyphHeight > magnifierContentHeight; 4834 } 4835 4836 protected final void updateMagnifier(@NonNull final MotionEvent event) { 4837 if (mMagnifierAnimator == null) { 4838 return; 4839 } 4840 4841 final PointF showPosInView = new PointF(); 4842 final boolean shouldShow = !tooLargeTextForMagnifier() 4843 && obtainMagnifierShowCoordinates(event, showPosInView); 4844 if (shouldShow) { 4845 // Make the cursor visible and stop blinking. 4846 mRenderCursorRegardlessTiming = true; 4847 mTextView.invalidateCursorPath(); 4848 suspendBlink(); 4849 mMagnifierAnimator.show(showPosInView.x, showPosInView.y); 4850 } else { 4851 dismissMagnifier(); 4852 } 4853 } 4854 4855 protected final void dismissMagnifier() { 4856 if (mMagnifierAnimator != null) { 4857 mMagnifierAnimator.dismiss(); 4858 mRenderCursorRegardlessTiming = false; 4859 resumeBlink(); 4860 } 4861 } 4862 4863 @Override 4864 public boolean onTouchEvent(MotionEvent ev) { 4865 updateFloatingToolbarVisibility(ev); 4866 4867 switch (ev.getActionMasked()) { 4868 case MotionEvent.ACTION_DOWN: { 4869 startTouchUpFilter(getCurrentCursorOffset()); 4870 4871 final PositionListener positionListener = getPositionListener(); 4872 mLastParentX = positionListener.getPositionX(); 4873 mLastParentY = positionListener.getPositionY(); 4874 mLastParentXOnScreen = positionListener.getPositionXOnScreen(); 4875 mLastParentYOnScreen = positionListener.getPositionYOnScreen(); 4876 4877 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4878 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4879 mTouchToWindowOffsetX = xInWindow - mPositionX; 4880 mTouchToWindowOffsetY = yInWindow - mPositionY; 4881 4882 mIsDragging = true; 4883 mPreviousLineTouched = UNSET_LINE; 4884 break; 4885 } 4886 4887 case MotionEvent.ACTION_MOVE: { 4888 final float xInWindow = ev.getRawX() - mLastParentXOnScreen + mLastParentX; 4889 final float yInWindow = ev.getRawY() - mLastParentYOnScreen + mLastParentY; 4890 4891 // Vertical hysteresis: vertical down movement tends to snap to ideal offset 4892 final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY; 4893 final float currentVerticalOffset = yInWindow - mPositionY - mLastParentY; 4894 float newVerticalOffset; 4895 if (previousVerticalOffset < mIdealVerticalOffset) { 4896 newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset); 4897 newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset); 4898 } else { 4899 newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset); 4900 newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset); 4901 } 4902 mTouchToWindowOffsetY = newVerticalOffset + mLastParentY; 4903 4904 final float newPosX = 4905 xInWindow - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset(); 4906 final float newPosY = yInWindow - mTouchToWindowOffsetY + mTouchOffsetY; 4907 4908 updatePosition(newPosX, newPosY, 4909 ev.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 4910 break; 4911 } 4912 4913 case MotionEvent.ACTION_UP: 4914 filterOnTouchUp(ev.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 4915 // Fall through. 4916 case MotionEvent.ACTION_CANCEL: 4917 mIsDragging = false; 4918 updateDrawable(); 4919 break; 4920 } 4921 return true; 4922 } 4923 4924 public boolean isDragging() { 4925 return mIsDragging; 4926 } 4927 4928 void onHandleMoved() {} 4929 4930 public void onDetached() {} 4931 } 4932 4933 private class InsertionHandleView extends HandleView { 4934 private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000; 4935 private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds 4936 4937 // Used to detect taps on the insertion handle, which will affect the insertion action mode 4938 private float mDownPositionX, mDownPositionY; 4939 private Runnable mHider; 4940 4941 public InsertionHandleView(Drawable drawable) { 4942 super(drawable, drawable, com.android.internal.R.id.insertion_handle); 4943 } 4944 4945 @Override 4946 public void show() { 4947 super.show(); 4948 4949 final long durationSinceCutOrCopy = 4950 SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime; 4951 4952 // Cancel the single tap delayed runnable. 4953 if (mInsertionActionModeRunnable != null 4954 && ((mTapState == TAP_STATE_DOUBLE_TAP) 4955 || (mTapState == TAP_STATE_TRIPLE_CLICK) 4956 || isCursorInsideEasyCorrectionSpan())) { 4957 mTextView.removeCallbacks(mInsertionActionModeRunnable); 4958 } 4959 4960 // Prepare and schedule the single tap runnable to run exactly after the double tap 4961 // timeout has passed. 4962 if ((mTapState != TAP_STATE_DOUBLE_TAP) && (mTapState != TAP_STATE_TRIPLE_CLICK) 4963 && !isCursorInsideEasyCorrectionSpan() 4964 && (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION)) { 4965 if (mTextActionMode == null) { 4966 if (mInsertionActionModeRunnable == null) { 4967 mInsertionActionModeRunnable = new Runnable() { 4968 @Override 4969 public void run() { 4970 startInsertionActionMode(); 4971 } 4972 }; 4973 } 4974 mTextView.postDelayed( 4975 mInsertionActionModeRunnable, 4976 ViewConfiguration.getDoubleTapTimeout() + 1); 4977 } 4978 4979 } 4980 4981 hideAfterDelay(); 4982 } 4983 4984 private void hideAfterDelay() { 4985 if (mHider == null) { 4986 mHider = new Runnable() { 4987 public void run() { 4988 hide(); 4989 } 4990 }; 4991 } else { 4992 removeHiderCallback(); 4993 } 4994 mTextView.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT); 4995 } 4996 4997 private void removeHiderCallback() { 4998 if (mHider != null) { 4999 mTextView.removeCallbacks(mHider); 5000 } 5001 } 5002 5003 @Override 5004 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 5005 return drawable.getIntrinsicWidth() / 2; 5006 } 5007 5008 @Override 5009 protected int getHorizontalGravity(boolean isRtlRun) { 5010 return Gravity.CENTER_HORIZONTAL; 5011 } 5012 5013 @Override 5014 protected int getCursorOffset() { 5015 int offset = super.getCursorOffset(); 5016 if (mDrawableForCursor != null) { 5017 mDrawableForCursor.getPadding(mTempRect); 5018 offset += (mDrawableForCursor.getIntrinsicWidth() 5019 - mTempRect.left - mTempRect.right) / 2; 5020 } 5021 return offset; 5022 } 5023 5024 @Override 5025 int getCursorHorizontalPosition(Layout layout, int offset) { 5026 if (mDrawableForCursor != null) { 5027 final float horizontal = getHorizontal(layout, offset); 5028 return clampHorizontalPosition(mDrawableForCursor, horizontal) + mTempRect.left; 5029 } 5030 return super.getCursorHorizontalPosition(layout, offset); 5031 } 5032 5033 @Override 5034 public boolean onTouchEvent(MotionEvent ev) { 5035 final boolean result = super.onTouchEvent(ev); 5036 5037 switch (ev.getActionMasked()) { 5038 case MotionEvent.ACTION_DOWN: 5039 mDownPositionX = ev.getRawX(); 5040 mDownPositionY = ev.getRawY(); 5041 updateMagnifier(ev); 5042 break; 5043 5044 case MotionEvent.ACTION_MOVE: 5045 updateMagnifier(ev); 5046 break; 5047 5048 case MotionEvent.ACTION_UP: 5049 if (!offsetHasBeenChanged()) { 5050 final float deltaX = mDownPositionX - ev.getRawX(); 5051 final float deltaY = mDownPositionY - ev.getRawY(); 5052 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5053 5054 final ViewConfiguration viewConfiguration = ViewConfiguration.get( 5055 mTextView.getContext()); 5056 final int touchSlop = viewConfiguration.getScaledTouchSlop(); 5057 5058 if (distanceSquared < touchSlop * touchSlop) { 5059 // Tapping on the handle toggles the insertion action mode. 5060 if (mTextActionMode != null) { 5061 stopTextActionMode(); 5062 } else { 5063 startInsertionActionMode(); 5064 } 5065 } 5066 } else { 5067 if (mTextActionMode != null) { 5068 mTextActionMode.invalidateContentRect(); 5069 } 5070 } 5071 // Fall through. 5072 case MotionEvent.ACTION_CANCEL: 5073 hideAfterDelay(); 5074 dismissMagnifier(); 5075 break; 5076 5077 default: 5078 break; 5079 } 5080 5081 return result; 5082 } 5083 5084 @Override 5085 public int getCurrentCursorOffset() { 5086 return mTextView.getSelectionStart(); 5087 } 5088 5089 @Override 5090 public void updateSelection(int offset) { 5091 Selection.setSelection((Spannable) mTextView.getText(), offset); 5092 } 5093 5094 @Override 5095 protected void updatePosition(float x, float y, boolean fromTouchScreen) { 5096 Layout layout = mTextView.getLayout(); 5097 int offset; 5098 if (layout != null) { 5099 if (mPreviousLineTouched == UNSET_LINE) { 5100 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 5101 } 5102 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 5103 offset = getOffsetAtCoordinate(layout, currLine, x); 5104 mPreviousLineTouched = currLine; 5105 } else { 5106 offset = -1; 5107 } 5108 positionAtCursorOffset(offset, false, fromTouchScreen); 5109 if (mTextActionMode != null) { 5110 invalidateActionMode(); 5111 } 5112 } 5113 5114 @Override 5115 void onHandleMoved() { 5116 super.onHandleMoved(); 5117 removeHiderCallback(); 5118 } 5119 5120 @Override 5121 public void onDetached() { 5122 super.onDetached(); 5123 removeHiderCallback(); 5124 } 5125 5126 @Override 5127 @MagnifierHandleTrigger 5128 protected int getMagnifierHandleTrigger() { 5129 return MagnifierHandleTrigger.INSERTION; 5130 } 5131 } 5132 5133 @Retention(RetentionPolicy.SOURCE) 5134 @IntDef(prefix = { "HANDLE_TYPE_" }, value = { 5135 HANDLE_TYPE_SELECTION_START, 5136 HANDLE_TYPE_SELECTION_END 5137 }) 5138 public @interface HandleType {} 5139 public static final int HANDLE_TYPE_SELECTION_START = 0; 5140 public static final int HANDLE_TYPE_SELECTION_END = 1; 5141 5142 /** For selection handles */ 5143 @VisibleForTesting 5144 public final class SelectionHandleView extends HandleView { 5145 // Indicates the handle type, selection start (HANDLE_TYPE_SELECTION_START) or selection 5146 // end (HANDLE_TYPE_SELECTION_END). 5147 @HandleType 5148 private final int mHandleType; 5149 // Indicates whether the cursor is making adjustments within a word. 5150 private boolean mInWord = false; 5151 // Difference between touch position and word boundary position. 5152 private float mTouchWordDelta; 5153 // X value of the previous updatePosition call. 5154 private float mPrevX; 5155 // Indicates if the handle has moved a boundary between LTR and RTL text. 5156 private boolean mLanguageDirectionChanged = false; 5157 // Distance from edge of horizontally scrolling text view 5158 // to use to switch to character mode. 5159 private final float mTextViewEdgeSlop; 5160 // Used to save text view location. 5161 private final int[] mTextViewLocation = new int[2]; 5162 5163 public SelectionHandleView(Drawable drawableLtr, Drawable drawableRtl, int id, 5164 @HandleType int handleType) { 5165 super(drawableLtr, drawableRtl, id); 5166 mHandleType = handleType; 5167 ViewConfiguration viewConfiguration = ViewConfiguration.get(mTextView.getContext()); 5168 mTextViewEdgeSlop = viewConfiguration.getScaledTouchSlop() * 4; 5169 } 5170 5171 private boolean isStartHandle() { 5172 return mHandleType == HANDLE_TYPE_SELECTION_START; 5173 } 5174 5175 @Override 5176 protected int getHotspotX(Drawable drawable, boolean isRtlRun) { 5177 if (isRtlRun == isStartHandle()) { 5178 return drawable.getIntrinsicWidth() / 4; 5179 } else { 5180 return (drawable.getIntrinsicWidth() * 3) / 4; 5181 } 5182 } 5183 5184 @Override 5185 protected int getHorizontalGravity(boolean isRtlRun) { 5186 return (isRtlRun == isStartHandle()) ? Gravity.LEFT : Gravity.RIGHT; 5187 } 5188 5189 @Override 5190 public int getCurrentCursorOffset() { 5191 return isStartHandle() ? mTextView.getSelectionStart() : mTextView.getSelectionEnd(); 5192 } 5193 5194 @Override 5195 protected void updateSelection(int offset) { 5196 if (isStartHandle()) { 5197 Selection.setSelection((Spannable) mTextView.getText(), offset, 5198 mTextView.getSelectionEnd()); 5199 } else { 5200 Selection.setSelection((Spannable) mTextView.getText(), 5201 mTextView.getSelectionStart(), offset); 5202 } 5203 updateDrawable(); 5204 if (mTextActionMode != null) { 5205 invalidateActionMode(); 5206 } 5207 } 5208 5209 @Override 5210 protected void updatePosition(float x, float y, boolean fromTouchScreen) { 5211 final Layout layout = mTextView.getLayout(); 5212 if (layout == null) { 5213 // HandleView will deal appropriately in positionAtCursorOffset when 5214 // layout is null. 5215 positionAndAdjustForCrossingHandles(mTextView.getOffsetForPosition(x, y), 5216 fromTouchScreen); 5217 return; 5218 } 5219 5220 if (mPreviousLineTouched == UNSET_LINE) { 5221 mPreviousLineTouched = mTextView.getLineAtCoordinate(y); 5222 } 5223 5224 boolean positionCursor = false; 5225 final int anotherHandleOffset = 5226 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 5227 int currLine = getCurrentLineAdjustedForSlop(layout, mPreviousLineTouched, y); 5228 int initialOffset = getOffsetAtCoordinate(layout, currLine, x); 5229 5230 if (isStartHandle() && initialOffset >= anotherHandleOffset 5231 || !isStartHandle() && initialOffset <= anotherHandleOffset) { 5232 // Handles have crossed, bound it to the first selected line and 5233 // adjust by word / char as normal. 5234 currLine = layout.getLineForOffset(anotherHandleOffset); 5235 initialOffset = getOffsetAtCoordinate(layout, currLine, x); 5236 } 5237 5238 int offset = initialOffset; 5239 final int wordEnd = getWordEnd(offset); 5240 final int wordStart = getWordStart(offset); 5241 5242 if (mPrevX == UNSET_X_VALUE) { 5243 mPrevX = x; 5244 } 5245 5246 final int currentOffset = getCurrentCursorOffset(); 5247 final boolean rtlAtCurrentOffset = isAtRtlRun(layout, currentOffset); 5248 final boolean atRtl = isAtRtlRun(layout, offset); 5249 final boolean isLvlBoundary = layout.isLevelBoundary(offset); 5250 5251 // We can't determine if the user is expanding or shrinking the selection if they're 5252 // on a bi-di boundary, so until they've moved past the boundary we'll just place 5253 // the cursor at the current position. 5254 if (isLvlBoundary || (rtlAtCurrentOffset && !atRtl) || (!rtlAtCurrentOffset && atRtl)) { 5255 // We're on a boundary or this is the first direction change -- just update 5256 // to the current position. 5257 mLanguageDirectionChanged = true; 5258 mTouchWordDelta = 0.0f; 5259 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 5260 return; 5261 } else if (mLanguageDirectionChanged && !isLvlBoundary) { 5262 // We've just moved past the boundary so update the position. After this we can 5263 // figure out if the user is expanding or shrinking to go by word or character. 5264 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 5265 mTouchWordDelta = 0.0f; 5266 mLanguageDirectionChanged = false; 5267 return; 5268 } 5269 5270 boolean isExpanding; 5271 final float xDiff = x - mPrevX; 5272 if (isStartHandle()) { 5273 isExpanding = currLine < mPreviousLineTouched; 5274 } else { 5275 isExpanding = currLine > mPreviousLineTouched; 5276 } 5277 if (atRtl == isStartHandle()) { 5278 isExpanding |= xDiff > 0; 5279 } else { 5280 isExpanding |= xDiff < 0; 5281 } 5282 5283 if (mTextView.getHorizontallyScrolling()) { 5284 if (positionNearEdgeOfScrollingView(x, atRtl) 5285 && ((isStartHandle() && mTextView.getScrollX() != 0) 5286 || (!isStartHandle() 5287 && mTextView.canScrollHorizontally(atRtl ? -1 : 1))) 5288 && ((isExpanding && ((isStartHandle() && offset < currentOffset) 5289 || (!isStartHandle() && offset > currentOffset))) 5290 || !isExpanding)) { 5291 // If we're expanding ensure that the offset is actually expanding compared to 5292 // the current offset, if the handle snapped to the word, the finger position 5293 // may be out of sync and we don't want the selection to jump back. 5294 mTouchWordDelta = 0.0f; 5295 final int nextOffset = (atRtl == isStartHandle()) 5296 ? layout.getOffsetToRightOf(mPreviousOffset) 5297 : layout.getOffsetToLeftOf(mPreviousOffset); 5298 positionAndAdjustForCrossingHandles(nextOffset, fromTouchScreen); 5299 return; 5300 } 5301 } 5302 5303 if (isExpanding) { 5304 // User is increasing the selection. 5305 int wordBoundary = isStartHandle() ? wordStart : wordEnd; 5306 final boolean snapToWord = (!mInWord 5307 || (isStartHandle() ? currLine < mPrevLine : currLine > mPrevLine)) 5308 && atRtl == isAtRtlRun(layout, wordBoundary); 5309 if (snapToWord) { 5310 // Sometimes words can be broken across lines (Chinese, hyphenation). 5311 // We still snap to the word boundary but we only use the letters on the 5312 // current line to determine if the user is far enough into the word to snap. 5313 if (layout.getLineForOffset(wordBoundary) != currLine) { 5314 wordBoundary = isStartHandle() 5315 ? layout.getLineStart(currLine) : layout.getLineEnd(currLine); 5316 } 5317 final int offsetThresholdToSnap = isStartHandle() 5318 ? wordEnd - ((wordEnd - wordBoundary) / 2) 5319 : wordStart + ((wordBoundary - wordStart) / 2); 5320 if (isStartHandle() 5321 && (offset <= offsetThresholdToSnap || currLine < mPrevLine)) { 5322 // User is far enough into the word or on a different line so we expand by 5323 // word. 5324 offset = wordStart; 5325 } else if (!isStartHandle() 5326 && (offset >= offsetThresholdToSnap || currLine > mPrevLine)) { 5327 // User is far enough into the word or on a different line so we expand by 5328 // word. 5329 offset = wordEnd; 5330 } else { 5331 offset = mPreviousOffset; 5332 } 5333 } 5334 if ((isStartHandle() && offset < initialOffset) 5335 || (!isStartHandle() && offset > initialOffset)) { 5336 final float adjustedX = getHorizontal(layout, offset); 5337 mTouchWordDelta = 5338 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 5339 } else { 5340 mTouchWordDelta = 0.0f; 5341 } 5342 positionCursor = true; 5343 } else { 5344 final int adjustedOffset = 5345 getOffsetAtCoordinate(layout, currLine, x - mTouchWordDelta); 5346 final boolean shrinking = isStartHandle() 5347 ? adjustedOffset > mPreviousOffset || currLine > mPrevLine 5348 : adjustedOffset < mPreviousOffset || currLine < mPrevLine; 5349 if (shrinking) { 5350 // User is shrinking the selection. 5351 if (currLine != mPrevLine) { 5352 // We're on a different line, so we'll snap to word boundaries. 5353 offset = isStartHandle() ? wordStart : wordEnd; 5354 if ((isStartHandle() && offset < initialOffset) 5355 || (!isStartHandle() && offset > initialOffset)) { 5356 final float adjustedX = getHorizontal(layout, offset); 5357 mTouchWordDelta = 5358 mTextView.convertToLocalHorizontalCoordinate(x) - adjustedX; 5359 } else { 5360 mTouchWordDelta = 0.0f; 5361 } 5362 } else { 5363 offset = adjustedOffset; 5364 } 5365 positionCursor = true; 5366 } else if ((isStartHandle() && adjustedOffset < mPreviousOffset) 5367 || (!isStartHandle() && adjustedOffset > mPreviousOffset)) { 5368 // Handle has jumped to the word boundary, and the user is moving 5369 // their finger towards the handle, the delta should be updated. 5370 mTouchWordDelta = mTextView.convertToLocalHorizontalCoordinate(x) 5371 - getHorizontal(layout, mPreviousOffset); 5372 } 5373 } 5374 5375 if (positionCursor) { 5376 mPreviousLineTouched = currLine; 5377 positionAndAdjustForCrossingHandles(offset, fromTouchScreen); 5378 } 5379 mPrevX = x; 5380 } 5381 5382 @Override 5383 protected void positionAtCursorOffset(int offset, boolean forceUpdatePosition, 5384 boolean fromTouchScreen) { 5385 super.positionAtCursorOffset(offset, forceUpdatePosition, fromTouchScreen); 5386 mInWord = (offset != -1) && !getWordIteratorWithText().isBoundary(offset); 5387 } 5388 5389 @Override 5390 public boolean onTouchEvent(MotionEvent event) { 5391 boolean superResult = super.onTouchEvent(event); 5392 5393 switch (event.getActionMasked()) { 5394 case MotionEvent.ACTION_DOWN: 5395 // Reset the touch word offset and x value when the user 5396 // re-engages the handle. 5397 mTouchWordDelta = 0.0f; 5398 mPrevX = UNSET_X_VALUE; 5399 updateMagnifier(event); 5400 break; 5401 5402 case MotionEvent.ACTION_MOVE: 5403 updateMagnifier(event); 5404 break; 5405 5406 case MotionEvent.ACTION_UP: 5407 case MotionEvent.ACTION_CANCEL: 5408 dismissMagnifier(); 5409 break; 5410 } 5411 5412 return superResult; 5413 } 5414 5415 private void positionAndAdjustForCrossingHandles(int offset, boolean fromTouchScreen) { 5416 final int anotherHandleOffset = 5417 isStartHandle() ? mTextView.getSelectionEnd() : mTextView.getSelectionStart(); 5418 if ((isStartHandle() && offset >= anotherHandleOffset) 5419 || (!isStartHandle() && offset <= anotherHandleOffset)) { 5420 mTouchWordDelta = 0.0f; 5421 final Layout layout = mTextView.getLayout(); 5422 if (layout != null && offset != anotherHandleOffset) { 5423 final float horiz = getHorizontal(layout, offset); 5424 final float anotherHandleHoriz = getHorizontal(layout, anotherHandleOffset, 5425 !isStartHandle()); 5426 final float currentHoriz = getHorizontal(layout, mPreviousOffset); 5427 if (currentHoriz < anotherHandleHoriz && horiz < anotherHandleHoriz 5428 || currentHoriz > anotherHandleHoriz && horiz > anotherHandleHoriz) { 5429 // This handle passes another one as it crossed a direction boundary. 5430 // Don't minimize the selection, but keep the handle at the run boundary. 5431 final int currentOffset = getCurrentCursorOffset(); 5432 final int offsetToGetRunRange = isStartHandle() 5433 ? currentOffset : Math.max(currentOffset - 1, 0); 5434 final long range = layout.getRunRange(offsetToGetRunRange); 5435 if (isStartHandle()) { 5436 offset = TextUtils.unpackRangeStartFromLong(range); 5437 } else { 5438 offset = TextUtils.unpackRangeEndFromLong(range); 5439 } 5440 positionAtCursorOffset(offset, false, fromTouchScreen); 5441 return; 5442 } 5443 } 5444 // Handles can not cross and selection is at least one character. 5445 offset = getNextCursorOffset(anotherHandleOffset, !isStartHandle()); 5446 } 5447 positionAtCursorOffset(offset, false, fromTouchScreen); 5448 } 5449 5450 private boolean positionNearEdgeOfScrollingView(float x, boolean atRtl) { 5451 mTextView.getLocationOnScreen(mTextViewLocation); 5452 boolean nearEdge; 5453 if (atRtl == isStartHandle()) { 5454 int rightEdge = mTextViewLocation[0] + mTextView.getWidth() 5455 - mTextView.getPaddingRight(); 5456 nearEdge = x > rightEdge - mTextViewEdgeSlop; 5457 } else { 5458 int leftEdge = mTextViewLocation[0] + mTextView.getPaddingLeft(); 5459 nearEdge = x < leftEdge + mTextViewEdgeSlop; 5460 } 5461 return nearEdge; 5462 } 5463 5464 @Override 5465 protected boolean isAtRtlRun(@NonNull Layout layout, int offset) { 5466 final int offsetToCheck = isStartHandle() ? offset : Math.max(offset - 1, 0); 5467 return layout.isRtlCharAt(offsetToCheck); 5468 } 5469 5470 @Override 5471 public float getHorizontal(@NonNull Layout layout, int offset) { 5472 return getHorizontal(layout, offset, isStartHandle()); 5473 } 5474 5475 private float getHorizontal(@NonNull Layout layout, int offset, boolean startHandle) { 5476 final int line = layout.getLineForOffset(offset); 5477 final int offsetToCheck = startHandle ? offset : Math.max(offset - 1, 0); 5478 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5479 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5480 return (isRtlChar == isRtlParagraph) 5481 ? layout.getPrimaryHorizontal(offset) : layout.getSecondaryHorizontal(offset); 5482 } 5483 5484 @Override 5485 protected int getOffsetAtCoordinate(@NonNull Layout layout, int line, float x) { 5486 final float localX = mTextView.convertToLocalHorizontalCoordinate(x); 5487 final int primaryOffset = layout.getOffsetForHorizontal(line, localX, true); 5488 if (!layout.isLevelBoundary(primaryOffset)) { 5489 return primaryOffset; 5490 } 5491 final int secondaryOffset = layout.getOffsetForHorizontal(line, localX, false); 5492 final int currentOffset = getCurrentCursorOffset(); 5493 final int primaryDiff = Math.abs(primaryOffset - currentOffset); 5494 final int secondaryDiff = Math.abs(secondaryOffset - currentOffset); 5495 if (primaryDiff < secondaryDiff) { 5496 return primaryOffset; 5497 } else if (primaryDiff > secondaryDiff) { 5498 return secondaryOffset; 5499 } else { 5500 final int offsetToCheck = isStartHandle() 5501 ? currentOffset : Math.max(currentOffset - 1, 0); 5502 final boolean isRtlChar = layout.isRtlCharAt(offsetToCheck); 5503 final boolean isRtlParagraph = layout.getParagraphDirection(line) == -1; 5504 return isRtlChar == isRtlParagraph ? primaryOffset : secondaryOffset; 5505 } 5506 } 5507 5508 @MagnifierHandleTrigger 5509 protected int getMagnifierHandleTrigger() { 5510 return isStartHandle() 5511 ? MagnifierHandleTrigger.SELECTION_START 5512 : MagnifierHandleTrigger.SELECTION_END; 5513 } 5514 } 5515 5516 private int getCurrentLineAdjustedForSlop(Layout layout, int prevLine, float y) { 5517 final int trueLine = mTextView.getLineAtCoordinate(y); 5518 if (layout == null || prevLine > layout.getLineCount() 5519 || layout.getLineCount() <= 0 || prevLine < 0) { 5520 // Invalid parameters, just return whatever line is at y. 5521 return trueLine; 5522 } 5523 5524 if (Math.abs(trueLine - prevLine) >= 2) { 5525 // Only stick to lines if we're within a line of the previous selection. 5526 return trueLine; 5527 } 5528 5529 final float verticalOffset = mTextView.viewportToContentVerticalOffset(); 5530 final int lineCount = layout.getLineCount(); 5531 final float slop = mTextView.getLineHeight() * LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS; 5532 5533 final float firstLineTop = layout.getLineTop(0) + verticalOffset; 5534 final float prevLineTop = layout.getLineTop(prevLine) + verticalOffset; 5535 final float yTopBound = Math.max(prevLineTop - slop, firstLineTop + slop); 5536 5537 final float lastLineBottom = layout.getLineBottom(lineCount - 1) + verticalOffset; 5538 final float prevLineBottom = layout.getLineBottom(prevLine) + verticalOffset; 5539 final float yBottomBound = Math.min(prevLineBottom + slop, lastLineBottom - slop); 5540 5541 // Determine if we've moved lines based on y position and previous line. 5542 int currLine; 5543 if (y <= yTopBound) { 5544 currLine = Math.max(prevLine - 1, 0); 5545 } else if (y >= yBottomBound) { 5546 currLine = Math.min(prevLine + 1, lineCount - 1); 5547 } else { 5548 currLine = prevLine; 5549 } 5550 return currLine; 5551 } 5552 5553 /** 5554 * A CursorController instance can be used to control a cursor in the text. 5555 */ 5556 private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener { 5557 /** 5558 * Makes the cursor controller visible on screen. 5559 * See also {@link #hide()}. 5560 */ 5561 public void show(); 5562 5563 /** 5564 * Hide the cursor controller from screen. 5565 * See also {@link #show()}. 5566 */ 5567 public void hide(); 5568 5569 /** 5570 * Called when the view is detached from window. Perform house keeping task, such as 5571 * stopping Runnable thread that would otherwise keep a reference on the context, thus 5572 * preventing the activity from being recycled. 5573 */ 5574 public void onDetached(); 5575 5576 public boolean isCursorBeingModified(); 5577 5578 public boolean isActive(); 5579 } 5580 5581 private class InsertionPointCursorController implements CursorController { 5582 private InsertionHandleView mHandle; 5583 5584 public void show() { 5585 getHandle().show(); 5586 5587 if (mSelectionModifierCursorController != null) { 5588 mSelectionModifierCursorController.hide(); 5589 } 5590 } 5591 5592 public void hide() { 5593 if (mHandle != null) { 5594 mHandle.hide(); 5595 } 5596 } 5597 5598 public void onTouchModeChanged(boolean isInTouchMode) { 5599 if (!isInTouchMode) { 5600 hide(); 5601 } 5602 } 5603 5604 private InsertionHandleView getHandle() { 5605 if (mSelectHandleCenter == null) { 5606 mSelectHandleCenter = mTextView.getContext().getDrawable( 5607 mTextView.mTextSelectHandleRes); 5608 } 5609 if (mHandle == null) { 5610 mHandle = new InsertionHandleView(mSelectHandleCenter); 5611 } 5612 return mHandle; 5613 } 5614 5615 @Override 5616 public void onDetached() { 5617 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 5618 observer.removeOnTouchModeChangeListener(this); 5619 5620 if (mHandle != null) mHandle.onDetached(); 5621 } 5622 5623 @Override 5624 public boolean isCursorBeingModified() { 5625 return mHandle != null && mHandle.isDragging(); 5626 } 5627 5628 @Override 5629 public boolean isActive() { 5630 return mHandle != null && mHandle.isShowing(); 5631 } 5632 5633 public void invalidateHandle() { 5634 if (mHandle != null) { 5635 mHandle.invalidate(); 5636 } 5637 } 5638 } 5639 5640 class SelectionModifierCursorController implements CursorController { 5641 // The cursor controller handles, lazily created when shown. 5642 private SelectionHandleView mStartHandle; 5643 private SelectionHandleView mEndHandle; 5644 // The offsets of that last touch down event. Remembered to start selection there. 5645 private int mMinTouchOffset, mMaxTouchOffset; 5646 5647 private float mDownPositionX, mDownPositionY; 5648 private boolean mGestureStayedInTapRegion; 5649 5650 // Where the user first starts the drag motion. 5651 private int mStartOffset = -1; 5652 5653 private boolean mHaventMovedEnoughToStartDrag; 5654 // The line that a selection happened most recently with the drag accelerator. 5655 private int mLineSelectionIsOn = -1; 5656 // Whether the drag accelerator has selected past the initial line. 5657 private boolean mSwitchedLines = false; 5658 5659 // Indicates the drag accelerator mode that the user is currently using. 5660 private int mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 5661 // Drag accelerator is inactive. 5662 private static final int DRAG_ACCELERATOR_MODE_INACTIVE = 0; 5663 // Character based selection by dragging. Only for mouse. 5664 private static final int DRAG_ACCELERATOR_MODE_CHARACTER = 1; 5665 // Word based selection by dragging. Enabled after long pressing or double tapping. 5666 private static final int DRAG_ACCELERATOR_MODE_WORD = 2; 5667 // Paragraph based selection by dragging. Enabled after mouse triple click. 5668 private static final int DRAG_ACCELERATOR_MODE_PARAGRAPH = 3; 5669 5670 SelectionModifierCursorController() { 5671 resetTouchOffsets(); 5672 } 5673 5674 public void show() { 5675 if (mTextView.isInBatchEditMode()) { 5676 return; 5677 } 5678 initDrawables(); 5679 initHandles(); 5680 } 5681 5682 private void initDrawables() { 5683 if (mSelectHandleLeft == null) { 5684 mSelectHandleLeft = mTextView.getContext().getDrawable( 5685 mTextView.mTextSelectHandleLeftRes); 5686 } 5687 if (mSelectHandleRight == null) { 5688 mSelectHandleRight = mTextView.getContext().getDrawable( 5689 mTextView.mTextSelectHandleRightRes); 5690 } 5691 } 5692 5693 private void initHandles() { 5694 // Lazy object creation has to be done before updatePosition() is called. 5695 if (mStartHandle == null) { 5696 mStartHandle = new SelectionHandleView(mSelectHandleLeft, mSelectHandleRight, 5697 com.android.internal.R.id.selection_start_handle, 5698 HANDLE_TYPE_SELECTION_START); 5699 } 5700 if (mEndHandle == null) { 5701 mEndHandle = new SelectionHandleView(mSelectHandleRight, mSelectHandleLeft, 5702 com.android.internal.R.id.selection_end_handle, 5703 HANDLE_TYPE_SELECTION_END); 5704 } 5705 5706 mStartHandle.show(); 5707 mEndHandle.show(); 5708 5709 hideInsertionPointCursorController(); 5710 } 5711 5712 public void hide() { 5713 if (mStartHandle != null) mStartHandle.hide(); 5714 if (mEndHandle != null) mEndHandle.hide(); 5715 } 5716 5717 public void enterDrag(int dragAcceleratorMode) { 5718 // Just need to init the handles / hide insertion cursor. 5719 show(); 5720 mDragAcceleratorMode = dragAcceleratorMode; 5721 // Start location of selection. 5722 mStartOffset = mTextView.getOffsetForPosition(mLastDownPositionX, 5723 mLastDownPositionY); 5724 mLineSelectionIsOn = mTextView.getLineAtCoordinate(mLastDownPositionY); 5725 // Don't show the handles until user has lifted finger. 5726 hide(); 5727 5728 // This stops scrolling parents from intercepting the touch event, allowing 5729 // the user to continue dragging across the screen to select text; TextView will 5730 // scroll as necessary. 5731 mTextView.getParent().requestDisallowInterceptTouchEvent(true); 5732 mTextView.cancelLongPress(); 5733 } 5734 5735 public void onTouchEvent(MotionEvent event) { 5736 // This is done even when the View does not have focus, so that long presses can start 5737 // selection and tap can move cursor from this tap position. 5738 final float eventX = event.getX(); 5739 final float eventY = event.getY(); 5740 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5741 switch (event.getActionMasked()) { 5742 case MotionEvent.ACTION_DOWN: 5743 if (extractedTextModeWillBeStarted()) { 5744 // Prevent duplicating the selection handles until the mode starts. 5745 hide(); 5746 } else { 5747 // Remember finger down position, to be able to start selection from there. 5748 mMinTouchOffset = mMaxTouchOffset = mTextView.getOffsetForPosition( 5749 eventX, eventY); 5750 5751 // Double tap detection 5752 if (mGestureStayedInTapRegion) { 5753 if (mTapState == TAP_STATE_DOUBLE_TAP 5754 || mTapState == TAP_STATE_TRIPLE_CLICK) { 5755 final float deltaX = eventX - mDownPositionX; 5756 final float deltaY = eventY - mDownPositionY; 5757 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5758 5759 ViewConfiguration viewConfiguration = ViewConfiguration.get( 5760 mTextView.getContext()); 5761 int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop(); 5762 boolean stayedInArea = 5763 distanceSquared < doubleTapSlop * doubleTapSlop; 5764 5765 if (stayedInArea && (isMouse || isPositionOnText(eventX, eventY))) { 5766 if (mTapState == TAP_STATE_DOUBLE_TAP) { 5767 selectCurrentWordAndStartDrag(); 5768 } else if (mTapState == TAP_STATE_TRIPLE_CLICK) { 5769 selectCurrentParagraphAndStartDrag(); 5770 } 5771 mDiscardNextActionUp = true; 5772 } 5773 } 5774 } 5775 5776 mDownPositionX = eventX; 5777 mDownPositionY = eventY; 5778 mGestureStayedInTapRegion = true; 5779 mHaventMovedEnoughToStartDrag = true; 5780 } 5781 break; 5782 5783 case MotionEvent.ACTION_POINTER_DOWN: 5784 case MotionEvent.ACTION_POINTER_UP: 5785 // Handle multi-point gestures. Keep min and max offset positions. 5786 // Only activated for devices that correctly handle multi-touch. 5787 if (mTextView.getContext().getPackageManager().hasSystemFeature( 5788 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { 5789 updateMinAndMaxOffsets(event); 5790 } 5791 break; 5792 5793 case MotionEvent.ACTION_MOVE: 5794 final ViewConfiguration viewConfig = ViewConfiguration.get( 5795 mTextView.getContext()); 5796 final int touchSlop = viewConfig.getScaledTouchSlop(); 5797 5798 if (mGestureStayedInTapRegion || mHaventMovedEnoughToStartDrag) { 5799 final float deltaX = eventX - mDownPositionX; 5800 final float deltaY = eventY - mDownPositionY; 5801 final float distanceSquared = deltaX * deltaX + deltaY * deltaY; 5802 5803 if (mGestureStayedInTapRegion) { 5804 int doubleTapTouchSlop = viewConfig.getScaledDoubleTapTouchSlop(); 5805 mGestureStayedInTapRegion = 5806 distanceSquared <= doubleTapTouchSlop * doubleTapTouchSlop; 5807 } 5808 if (mHaventMovedEnoughToStartDrag) { 5809 // We don't start dragging until the user has moved enough. 5810 mHaventMovedEnoughToStartDrag = 5811 distanceSquared <= touchSlop * touchSlop; 5812 } 5813 } 5814 5815 if (isMouse && !isDragAcceleratorActive()) { 5816 final int offset = mTextView.getOffsetForPosition(eventX, eventY); 5817 if (mTextView.hasSelection() 5818 && (!mHaventMovedEnoughToStartDrag || mStartOffset != offset) 5819 && offset >= mTextView.getSelectionStart() 5820 && offset <= mTextView.getSelectionEnd()) { 5821 startDragAndDrop(); 5822 break; 5823 } 5824 5825 if (mStartOffset != offset) { 5826 // Start character based drag accelerator. 5827 stopTextActionMode(); 5828 enterDrag(DRAG_ACCELERATOR_MODE_CHARACTER); 5829 mDiscardNextActionUp = true; 5830 mHaventMovedEnoughToStartDrag = false; 5831 } 5832 } 5833 5834 if (mStartHandle != null && mStartHandle.isShowing()) { 5835 // Don't do the drag if the handles are showing already. 5836 break; 5837 } 5838 5839 updateSelection(event); 5840 break; 5841 5842 case MotionEvent.ACTION_UP: 5843 if (!isDragAcceleratorActive()) { 5844 break; 5845 } 5846 updateSelection(event); 5847 5848 // No longer dragging to select text, let the parent intercept events. 5849 mTextView.getParent().requestDisallowInterceptTouchEvent(false); 5850 5851 // No longer the first dragging motion, reset. 5852 resetDragAcceleratorState(); 5853 5854 if (mTextView.hasSelection()) { 5855 // Drag selection should not be adjusted by the text classifier. 5856 startSelectionActionModeAsync(mHaventMovedEnoughToStartDrag); 5857 } 5858 break; 5859 } 5860 } 5861 5862 private void updateSelection(MotionEvent event) { 5863 if (mTextView.getLayout() != null) { 5864 switch (mDragAcceleratorMode) { 5865 case DRAG_ACCELERATOR_MODE_CHARACTER: 5866 updateCharacterBasedSelection(event); 5867 break; 5868 case DRAG_ACCELERATOR_MODE_WORD: 5869 updateWordBasedSelection(event); 5870 break; 5871 case DRAG_ACCELERATOR_MODE_PARAGRAPH: 5872 updateParagraphBasedSelection(event); 5873 break; 5874 } 5875 } 5876 } 5877 5878 /** 5879 * If the TextView allows text selection, selects the current paragraph and starts a drag. 5880 * 5881 * @return true if the drag was started. 5882 */ 5883 private boolean selectCurrentParagraphAndStartDrag() { 5884 if (mInsertionActionModeRunnable != null) { 5885 mTextView.removeCallbacks(mInsertionActionModeRunnable); 5886 } 5887 stopTextActionMode(); 5888 if (!selectCurrentParagraph()) { 5889 return false; 5890 } 5891 enterDrag(SelectionModifierCursorController.DRAG_ACCELERATOR_MODE_PARAGRAPH); 5892 return true; 5893 } 5894 5895 private void updateCharacterBasedSelection(MotionEvent event) { 5896 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5897 updateSelectionInternal(mStartOffset, offset, 5898 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5899 } 5900 5901 private void updateWordBasedSelection(MotionEvent event) { 5902 if (mHaventMovedEnoughToStartDrag) { 5903 return; 5904 } 5905 final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE); 5906 final ViewConfiguration viewConfig = ViewConfiguration.get( 5907 mTextView.getContext()); 5908 final float eventX = event.getX(); 5909 final float eventY = event.getY(); 5910 final int currLine; 5911 if (isMouse) { 5912 // No need to offset the y coordinate for mouse input. 5913 currLine = mTextView.getLineAtCoordinate(eventY); 5914 } else { 5915 float y = eventY; 5916 if (mSwitchedLines) { 5917 // Offset the finger by the same vertical offset as the handles. 5918 // This improves visibility of the content being selected by 5919 // shifting the finger below the content, this is applied once 5920 // the user has switched lines. 5921 final int touchSlop = viewConfig.getScaledTouchSlop(); 5922 final float fingerOffset = (mStartHandle != null) 5923 ? mStartHandle.getIdealVerticalOffset() 5924 : touchSlop; 5925 y = eventY - fingerOffset; 5926 } 5927 5928 currLine = getCurrentLineAdjustedForSlop(mTextView.getLayout(), mLineSelectionIsOn, 5929 y); 5930 if (!mSwitchedLines && currLine != mLineSelectionIsOn) { 5931 // Break early here, we want to offset the finger position from 5932 // the selection highlight, once the user moved their finger 5933 // to a different line we should apply the offset and *not* switch 5934 // lines until recomputing the position with the finger offset. 5935 mSwitchedLines = true; 5936 return; 5937 } 5938 } 5939 5940 int startOffset; 5941 int offset = mTextView.getOffsetAtCoordinate(currLine, eventX); 5942 // Snap to word boundaries. 5943 if (mStartOffset < offset) { 5944 // Expanding with end handle. 5945 offset = getWordEnd(offset); 5946 startOffset = getWordStart(mStartOffset); 5947 } else { 5948 // Expanding with start handle. 5949 offset = getWordStart(offset); 5950 startOffset = getWordEnd(mStartOffset); 5951 if (startOffset == offset) { 5952 offset = getNextCursorOffset(offset, false); 5953 } 5954 } 5955 mLineSelectionIsOn = currLine; 5956 updateSelectionInternal(startOffset, offset, 5957 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5958 } 5959 5960 private void updateParagraphBasedSelection(MotionEvent event) { 5961 final int offset = mTextView.getOffsetForPosition(event.getX(), event.getY()); 5962 5963 final int start = Math.min(offset, mStartOffset); 5964 final int end = Math.max(offset, mStartOffset); 5965 final long paragraphsRange = getParagraphsRange(start, end); 5966 final int selectionStart = TextUtils.unpackRangeStartFromLong(paragraphsRange); 5967 final int selectionEnd = TextUtils.unpackRangeEndFromLong(paragraphsRange); 5968 updateSelectionInternal(selectionStart, selectionEnd, 5969 event.isFromSource(InputDevice.SOURCE_TOUCHSCREEN)); 5970 } 5971 5972 private void updateSelectionInternal(int selectionStart, int selectionEnd, 5973 boolean fromTouchScreen) { 5974 final boolean performHapticFeedback = fromTouchScreen && mHapticTextHandleEnabled 5975 && ((mTextView.getSelectionStart() != selectionStart) 5976 || (mTextView.getSelectionEnd() != selectionEnd)); 5977 Selection.setSelection((Spannable) mTextView.getText(), selectionStart, selectionEnd); 5978 if (performHapticFeedback) { 5979 mTextView.performHapticFeedback(HapticFeedbackConstants.TEXT_HANDLE_MOVE); 5980 } 5981 } 5982 5983 /** 5984 * @param event 5985 */ 5986 private void updateMinAndMaxOffsets(MotionEvent event) { 5987 int pointerCount = event.getPointerCount(); 5988 for (int index = 0; index < pointerCount; index++) { 5989 int offset = mTextView.getOffsetForPosition(event.getX(index), event.getY(index)); 5990 if (offset < mMinTouchOffset) mMinTouchOffset = offset; 5991 if (offset > mMaxTouchOffset) mMaxTouchOffset = offset; 5992 } 5993 } 5994 5995 public int getMinTouchOffset() { 5996 return mMinTouchOffset; 5997 } 5998 5999 public int getMaxTouchOffset() { 6000 return mMaxTouchOffset; 6001 } 6002 6003 public void resetTouchOffsets() { 6004 mMinTouchOffset = mMaxTouchOffset = -1; 6005 resetDragAcceleratorState(); 6006 } 6007 6008 private void resetDragAcceleratorState() { 6009 mStartOffset = -1; 6010 mDragAcceleratorMode = DRAG_ACCELERATOR_MODE_INACTIVE; 6011 mSwitchedLines = false; 6012 final int selectionStart = mTextView.getSelectionStart(); 6013 final int selectionEnd = mTextView.getSelectionEnd(); 6014 if (selectionStart > selectionEnd) { 6015 Selection.setSelection((Spannable) mTextView.getText(), 6016 selectionEnd, selectionStart); 6017 } 6018 } 6019 6020 /** 6021 * @return true iff this controller is currently used to move the selection start. 6022 */ 6023 public boolean isSelectionStartDragged() { 6024 return mStartHandle != null && mStartHandle.isDragging(); 6025 } 6026 6027 @Override 6028 public boolean isCursorBeingModified() { 6029 return isDragAcceleratorActive() || isSelectionStartDragged() 6030 || (mEndHandle != null && mEndHandle.isDragging()); 6031 } 6032 6033 /** 6034 * @return true if the user is selecting text using the drag accelerator. 6035 */ 6036 public boolean isDragAcceleratorActive() { 6037 return mDragAcceleratorMode != DRAG_ACCELERATOR_MODE_INACTIVE; 6038 } 6039 6040 public void onTouchModeChanged(boolean isInTouchMode) { 6041 if (!isInTouchMode) { 6042 hide(); 6043 } 6044 } 6045 6046 @Override 6047 public void onDetached() { 6048 final ViewTreeObserver observer = mTextView.getViewTreeObserver(); 6049 observer.removeOnTouchModeChangeListener(this); 6050 6051 if (mStartHandle != null) mStartHandle.onDetached(); 6052 if (mEndHandle != null) mEndHandle.onDetached(); 6053 } 6054 6055 @Override 6056 public boolean isActive() { 6057 return mStartHandle != null && mStartHandle.isShowing(); 6058 } 6059 6060 public void invalidateHandles() { 6061 if (mStartHandle != null) { 6062 mStartHandle.invalidate(); 6063 } 6064 if (mEndHandle != null) { 6065 mEndHandle.invalidate(); 6066 } 6067 } 6068 } 6069 6070 private class CorrectionHighlighter { 6071 private final Path mPath = new Path(); 6072 private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 6073 private int mStart, mEnd; 6074 private long mFadingStartTime; 6075 private RectF mTempRectF; 6076 private static final int FADE_OUT_DURATION = 400; 6077 6078 public CorrectionHighlighter() { 6079 mPaint.setCompatibilityScaling( 6080 mTextView.getResources().getCompatibilityInfo().applicationScale); 6081 mPaint.setStyle(Paint.Style.FILL); 6082 } 6083 6084 public void highlight(CorrectionInfo info) { 6085 mStart = info.getOffset(); 6086 mEnd = mStart + info.getNewText().length(); 6087 mFadingStartTime = SystemClock.uptimeMillis(); 6088 6089 if (mStart < 0 || mEnd < 0) { 6090 stopAnimation(); 6091 } 6092 } 6093 6094 public void draw(Canvas canvas, int cursorOffsetVertical) { 6095 if (updatePath() && updatePaint()) { 6096 if (cursorOffsetVertical != 0) { 6097 canvas.translate(0, cursorOffsetVertical); 6098 } 6099 6100 canvas.drawPath(mPath, mPaint); 6101 6102 if (cursorOffsetVertical != 0) { 6103 canvas.translate(0, -cursorOffsetVertical); 6104 } 6105 invalidate(true); // TODO invalidate cursor region only 6106 } else { 6107 stopAnimation(); 6108 invalidate(false); // TODO invalidate cursor region only 6109 } 6110 } 6111 6112 private boolean updatePaint() { 6113 final long duration = SystemClock.uptimeMillis() - mFadingStartTime; 6114 if (duration > FADE_OUT_DURATION) return false; 6115 6116 final float coef = 1.0f - (float) duration / FADE_OUT_DURATION; 6117 final int highlightColorAlpha = Color.alpha(mTextView.mHighlightColor); 6118 final int color = (mTextView.mHighlightColor & 0x00FFFFFF) 6119 + ((int) (highlightColorAlpha * coef) << 24); 6120 mPaint.setColor(color); 6121 return true; 6122 } 6123 6124 private boolean updatePath() { 6125 final Layout layout = mTextView.getLayout(); 6126 if (layout == null) return false; 6127 6128 // Update in case text is edited while the animation is run 6129 final int length = mTextView.getText().length(); 6130 int start = Math.min(length, mStart); 6131 int end = Math.min(length, mEnd); 6132 6133 mPath.reset(); 6134 layout.getSelectionPath(start, end, mPath); 6135 return true; 6136 } 6137 6138 private void invalidate(boolean delayed) { 6139 if (mTextView.getLayout() == null) return; 6140 6141 if (mTempRectF == null) mTempRectF = new RectF(); 6142 mPath.computeBounds(mTempRectF, false); 6143 6144 int left = mTextView.getCompoundPaddingLeft(); 6145 int top = mTextView.getExtendedPaddingTop() + mTextView.getVerticalOffset(true); 6146 6147 if (delayed) { 6148 mTextView.postInvalidateOnAnimation( 6149 left + (int) mTempRectF.left, top + (int) mTempRectF.top, 6150 left + (int) mTempRectF.right, top + (int) mTempRectF.bottom); 6151 } else { 6152 mTextView.postInvalidate((int) mTempRectF.left, (int) mTempRectF.top, 6153 (int) mTempRectF.right, (int) mTempRectF.bottom); 6154 } 6155 } 6156 6157 private void stopAnimation() { 6158 Editor.this.mCorrectionHighlighter = null; 6159 } 6160 } 6161 6162 private static class ErrorPopup extends PopupWindow { 6163 private boolean mAbove = false; 6164 private final TextView mView; 6165 private int mPopupInlineErrorBackgroundId = 0; 6166 private int mPopupInlineErrorAboveBackgroundId = 0; 6167 6168 ErrorPopup(TextView v, int width, int height) { 6169 super(v, width, height); 6170 mView = v; 6171 // Make sure the TextView has a background set as it will be used the first time it is 6172 // shown and positioned. Initialized with below background, which should have 6173 // dimensions identical to the above version for this to work (and is more likely). 6174 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 6175 com.android.internal.R.styleable.Theme_errorMessageBackground); 6176 mView.setBackgroundResource(mPopupInlineErrorBackgroundId); 6177 } 6178 6179 void fixDirection(boolean above) { 6180 mAbove = above; 6181 6182 if (above) { 6183 mPopupInlineErrorAboveBackgroundId = 6184 getResourceId(mPopupInlineErrorAboveBackgroundId, 6185 com.android.internal.R.styleable.Theme_errorMessageAboveBackground); 6186 } else { 6187 mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId, 6188 com.android.internal.R.styleable.Theme_errorMessageBackground); 6189 } 6190 6191 mView.setBackgroundResource( 6192 above ? mPopupInlineErrorAboveBackgroundId : mPopupInlineErrorBackgroundId); 6193 } 6194 6195 private int getResourceId(int currentId, int index) { 6196 if (currentId == 0) { 6197 TypedArray styledAttributes = mView.getContext().obtainStyledAttributes( 6198 R.styleable.Theme); 6199 currentId = styledAttributes.getResourceId(index, 0); 6200 styledAttributes.recycle(); 6201 } 6202 return currentId; 6203 } 6204 6205 @Override 6206 public void update(int x, int y, int w, int h, boolean force) { 6207 super.update(x, y, w, h, force); 6208 6209 boolean above = isAboveAnchor(); 6210 if (above != mAbove) { 6211 fixDirection(above); 6212 } 6213 } 6214 } 6215 6216 static class InputContentType { 6217 int imeOptions = EditorInfo.IME_NULL; 6218 String privateImeOptions; 6219 CharSequence imeActionLabel; 6220 int imeActionId; 6221 Bundle extras; 6222 OnEditorActionListener onEditorActionListener; 6223 boolean enterDown; 6224 LocaleList imeHintLocales; 6225 } 6226 6227 static class InputMethodState { 6228 ExtractedTextRequest mExtractedTextRequest; 6229 final ExtractedText mExtractedText = new ExtractedText(); 6230 int mBatchEditNesting; 6231 boolean mCursorChanged; 6232 boolean mSelectionModeChanged; 6233 boolean mContentChanged; 6234 int mChangedStart, mChangedEnd, mChangedDelta; 6235 } 6236 6237 /** 6238 * @return True iff (start, end) is a valid range within the text. 6239 */ 6240 private static boolean isValidRange(CharSequence text, int start, int end) { 6241 return 0 <= start && start <= end && end <= text.length(); 6242 } 6243 6244 @VisibleForTesting 6245 public SuggestionsPopupWindow getSuggestionsPopupWindowForTesting() { 6246 return mSuggestionsPopupWindow; 6247 } 6248 6249 /** 6250 * An InputFilter that monitors text input to maintain undo history. It does not modify the 6251 * text being typed (and hence always returns null from the filter() method). 6252 * 6253 * TODO: Make this span aware. 6254 */ 6255 public static class UndoInputFilter implements InputFilter { 6256 private final Editor mEditor; 6257 6258 // Whether the current filter pass is directly caused by an end-user text edit. 6259 private boolean mIsUserEdit; 6260 6261 // Whether the text field is handling an IME composition. Must be parceled in case the user 6262 // rotates the screen during composition. 6263 private boolean mHasComposition; 6264 6265 // Whether the user is expanding or shortening the text 6266 private boolean mExpanding; 6267 6268 // Whether the previous edit operation was in the current batch edit. 6269 private boolean mPreviousOperationWasInSameBatchEdit; 6270 6271 public UndoInputFilter(Editor editor) { 6272 mEditor = editor; 6273 } 6274 6275 public void saveInstanceState(Parcel parcel) { 6276 parcel.writeInt(mIsUserEdit ? 1 : 0); 6277 parcel.writeInt(mHasComposition ? 1 : 0); 6278 parcel.writeInt(mExpanding ? 1 : 0); 6279 parcel.writeInt(mPreviousOperationWasInSameBatchEdit ? 1 : 0); 6280 } 6281 6282 public void restoreInstanceState(Parcel parcel) { 6283 mIsUserEdit = parcel.readInt() != 0; 6284 mHasComposition = parcel.readInt() != 0; 6285 mExpanding = parcel.readInt() != 0; 6286 mPreviousOperationWasInSameBatchEdit = parcel.readInt() != 0; 6287 } 6288 6289 /** 6290 * Signals that a user-triggered edit is starting. 6291 */ 6292 public void beginBatchEdit() { 6293 if (DEBUG_UNDO) Log.d(TAG, "beginBatchEdit"); 6294 mIsUserEdit = true; 6295 } 6296 6297 public void endBatchEdit() { 6298 if (DEBUG_UNDO) Log.d(TAG, "endBatchEdit"); 6299 mIsUserEdit = false; 6300 mPreviousOperationWasInSameBatchEdit = false; 6301 } 6302 6303 @Override 6304 public CharSequence filter(CharSequence source, int start, int end, 6305 Spanned dest, int dstart, int dend) { 6306 if (DEBUG_UNDO) { 6307 Log.d(TAG, "filter: source=" + source + " (" + start + "-" + end + ") " 6308 + "dest=" + dest + " (" + dstart + "-" + dend + ")"); 6309 } 6310 6311 // Check to see if this edit should be tracked for undo. 6312 if (!canUndoEdit(source, start, end, dest, dstart, dend)) { 6313 return null; 6314 } 6315 6316 final boolean hadComposition = mHasComposition; 6317 mHasComposition = isComposition(source); 6318 final boolean wasExpanding = mExpanding; 6319 boolean shouldCreateSeparateState = false; 6320 if ((end - start) != (dend - dstart)) { 6321 mExpanding = (end - start) > (dend - dstart); 6322 if (hadComposition && mExpanding != wasExpanding) { 6323 shouldCreateSeparateState = true; 6324 } 6325 } 6326 6327 // Handle edit. 6328 handleEdit(source, start, end, dest, dstart, dend, shouldCreateSeparateState); 6329 return null; 6330 } 6331 6332 void freezeLastEdit() { 6333 mEditor.mUndoManager.beginUpdate("Edit text"); 6334 EditOperation lastEdit = getLastEdit(); 6335 if (lastEdit != null) { 6336 lastEdit.mFrozen = true; 6337 } 6338 mEditor.mUndoManager.endUpdate(); 6339 } 6340 6341 @Retention(RetentionPolicy.SOURCE) 6342 @IntDef(prefix = { "MERGE_EDIT_MODE_" }, value = { 6343 MERGE_EDIT_MODE_FORCE_MERGE, 6344 MERGE_EDIT_MODE_NEVER_MERGE, 6345 MERGE_EDIT_MODE_NORMAL 6346 }) 6347 private @interface MergeMode {} 6348 private static final int MERGE_EDIT_MODE_FORCE_MERGE = 0; 6349 private static final int MERGE_EDIT_MODE_NEVER_MERGE = 1; 6350 /** Use {@link EditOperation#mergeWith} to merge */ 6351 private static final int MERGE_EDIT_MODE_NORMAL = 2; 6352 6353 private void handleEdit(CharSequence source, int start, int end, 6354 Spanned dest, int dstart, int dend, boolean shouldCreateSeparateState) { 6355 // An application may install a TextWatcher to provide additional modifications after 6356 // the initial input filters run (e.g. a credit card formatter that adds spaces to a 6357 // string). This results in multiple filter() calls for what the user considers to be 6358 // a single operation. Always undo the whole set of changes in one step. 6359 @MergeMode 6360 final int mergeMode; 6361 if (isInTextWatcher() || mPreviousOperationWasInSameBatchEdit) { 6362 mergeMode = MERGE_EDIT_MODE_FORCE_MERGE; 6363 } else if (shouldCreateSeparateState) { 6364 mergeMode = MERGE_EDIT_MODE_NEVER_MERGE; 6365 } else { 6366 mergeMode = MERGE_EDIT_MODE_NORMAL; 6367 } 6368 // Build a new operation with all the information from this edit. 6369 String newText = TextUtils.substring(source, start, end); 6370 String oldText = TextUtils.substring(dest, dstart, dend); 6371 EditOperation edit = new EditOperation(mEditor, oldText, dstart, newText, 6372 mHasComposition); 6373 if (mHasComposition && TextUtils.equals(edit.mNewText, edit.mOldText)) { 6374 return; 6375 } 6376 recordEdit(edit, mergeMode); 6377 } 6378 6379 private EditOperation getLastEdit() { 6380 final UndoManager um = mEditor.mUndoManager; 6381 return um.getLastOperation( 6382 EditOperation.class, mEditor.mUndoOwner, UndoManager.MERGE_MODE_UNIQUE); 6383 } 6384 /** 6385 * Fetches the last undo operation and checks to see if a new edit should be merged into it. 6386 * If forceMerge is true then the new edit is always merged. 6387 */ 6388 private void recordEdit(EditOperation edit, @MergeMode int mergeMode) { 6389 // Fetch the last edit operation and attempt to merge in the new edit. 6390 final UndoManager um = mEditor.mUndoManager; 6391 um.beginUpdate("Edit text"); 6392 EditOperation lastEdit = getLastEdit(); 6393 if (lastEdit == null) { 6394 // Add this as the first edit. 6395 if (DEBUG_UNDO) Log.d(TAG, "filter: adding first op " + edit); 6396 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 6397 } else if (mergeMode == MERGE_EDIT_MODE_FORCE_MERGE) { 6398 // Forced merges take priority because they could be the result of a non-user-edit 6399 // change and this case should not create a new undo operation. 6400 if (DEBUG_UNDO) Log.d(TAG, "filter: force merge " + edit); 6401 lastEdit.forceMergeWith(edit); 6402 } else if (!mIsUserEdit) { 6403 // An application directly modified the Editable outside of a text edit. Treat this 6404 // as a new change and don't attempt to merge. 6405 if (DEBUG_UNDO) Log.d(TAG, "non-user edit, new op " + edit); 6406 um.commitState(mEditor.mUndoOwner); 6407 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 6408 } else if (mergeMode == MERGE_EDIT_MODE_NORMAL && lastEdit.mergeWith(edit)) { 6409 // Merge succeeded, nothing else to do. 6410 if (DEBUG_UNDO) Log.d(TAG, "filter: merge succeeded, created " + lastEdit); 6411 } else { 6412 // Could not merge with the last edit, so commit the last edit and add this edit. 6413 if (DEBUG_UNDO) Log.d(TAG, "filter: merge failed, adding " + edit); 6414 um.commitState(mEditor.mUndoOwner); 6415 um.addOperation(edit, UndoManager.MERGE_MODE_NONE); 6416 } 6417 mPreviousOperationWasInSameBatchEdit = mIsUserEdit; 6418 um.endUpdate(); 6419 } 6420 6421 private boolean canUndoEdit(CharSequence source, int start, int end, 6422 Spanned dest, int dstart, int dend) { 6423 if (!mEditor.mAllowUndo) { 6424 if (DEBUG_UNDO) Log.d(TAG, "filter: undo is disabled"); 6425 return false; 6426 } 6427 6428 if (mEditor.mUndoManager.isInUndo()) { 6429 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping, currently performing undo/redo"); 6430 return false; 6431 } 6432 6433 // Text filters run before input operations are applied. However, some input operations 6434 // are invalid and will throw exceptions when applied. This is common in tests. Don't 6435 // attempt to undo invalid operations. 6436 if (!isValidRange(source, start, end) || !isValidRange(dest, dstart, dend)) { 6437 if (DEBUG_UNDO) Log.d(TAG, "filter: invalid op"); 6438 return false; 6439 } 6440 6441 // Earlier filters can rewrite input to be a no-op, for example due to a length limit 6442 // on an input field. Skip no-op changes. 6443 if (start == end && dstart == dend) { 6444 if (DEBUG_UNDO) Log.d(TAG, "filter: skipping no-op"); 6445 return false; 6446 } 6447 6448 return true; 6449 } 6450 6451 private static boolean isComposition(CharSequence source) { 6452 if (!(source instanceof Spannable)) { 6453 return false; 6454 } 6455 // This is a composition edit if the source has a non-zero-length composing span. 6456 Spannable text = (Spannable) source; 6457 int composeBegin = EditableInputConnection.getComposingSpanStart(text); 6458 int composeEnd = EditableInputConnection.getComposingSpanEnd(text); 6459 return composeBegin < composeEnd; 6460 } 6461 6462 private boolean isInTextWatcher() { 6463 CharSequence text = mEditor.mTextView.getText(); 6464 return (text instanceof SpannableStringBuilder) 6465 && ((SpannableStringBuilder) text).getTextWatcherDepth() > 0; 6466 } 6467 } 6468 6469 /** 6470 * An operation to undo a single "edit" to a text view. 6471 */ 6472 public static class EditOperation extends UndoOperation<Editor> { 6473 private static final int TYPE_INSERT = 0; 6474 private static final int TYPE_DELETE = 1; 6475 private static final int TYPE_REPLACE = 2; 6476 6477 private int mType; 6478 private String mOldText; 6479 private String mNewText; 6480 private int mStart; 6481 6482 private int mOldCursorPos; 6483 private int mNewCursorPos; 6484 private boolean mFrozen; 6485 private boolean mIsComposition; 6486 6487 /** 6488 * Constructs an edit operation from a text input operation on editor that replaces the 6489 * oldText starting at dstart with newText. 6490 */ 6491 public EditOperation(Editor editor, String oldText, int dstart, String newText, 6492 boolean isComposition) { 6493 super(editor.mUndoOwner); 6494 mOldText = oldText; 6495 mNewText = newText; 6496 6497 // Determine the type of the edit. 6498 if (mNewText.length() > 0 && mOldText.length() == 0) { 6499 mType = TYPE_INSERT; 6500 } else if (mNewText.length() == 0 && mOldText.length() > 0) { 6501 mType = TYPE_DELETE; 6502 } else { 6503 mType = TYPE_REPLACE; 6504 } 6505 6506 mStart = dstart; 6507 // Store cursor data. 6508 mOldCursorPos = editor.mTextView.getSelectionStart(); 6509 mNewCursorPos = dstart + mNewText.length(); 6510 mIsComposition = isComposition; 6511 } 6512 6513 public EditOperation(Parcel src, ClassLoader loader) { 6514 super(src, loader); 6515 mType = src.readInt(); 6516 mOldText = src.readString(); 6517 mNewText = src.readString(); 6518 mStart = src.readInt(); 6519 mOldCursorPos = src.readInt(); 6520 mNewCursorPos = src.readInt(); 6521 mFrozen = src.readInt() == 1; 6522 mIsComposition = src.readInt() == 1; 6523 } 6524 6525 @Override 6526 public void writeToParcel(Parcel dest, int flags) { 6527 dest.writeInt(mType); 6528 dest.writeString(mOldText); 6529 dest.writeString(mNewText); 6530 dest.writeInt(mStart); 6531 dest.writeInt(mOldCursorPos); 6532 dest.writeInt(mNewCursorPos); 6533 dest.writeInt(mFrozen ? 1 : 0); 6534 dest.writeInt(mIsComposition ? 1 : 0); 6535 } 6536 6537 private int getNewTextEnd() { 6538 return mStart + mNewText.length(); 6539 } 6540 6541 private int getOldTextEnd() { 6542 return mStart + mOldText.length(); 6543 } 6544 6545 @Override 6546 public void commit() { 6547 } 6548 6549 @Override 6550 public void undo() { 6551 if (DEBUG_UNDO) Log.d(TAG, "undo"); 6552 // Remove the new text and insert the old. 6553 Editor editor = getOwnerData(); 6554 Editable text = (Editable) editor.mTextView.getText(); 6555 modifyText(text, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6556 } 6557 6558 @Override 6559 public void redo() { 6560 if (DEBUG_UNDO) Log.d(TAG, "redo"); 6561 // Remove the old text and insert the new. 6562 Editor editor = getOwnerData(); 6563 Editable text = (Editable) editor.mTextView.getText(); 6564 modifyText(text, mStart, getOldTextEnd(), mNewText, mStart, mNewCursorPos); 6565 } 6566 6567 /** 6568 * Attempts to merge this existing operation with a new edit. 6569 * @param edit The new edit operation. 6570 * @return If the merge succeeded, returns true. Otherwise returns false and leaves this 6571 * object unchanged. 6572 */ 6573 private boolean mergeWith(EditOperation edit) { 6574 if (DEBUG_UNDO) { 6575 Log.d(TAG, "mergeWith old " + this); 6576 Log.d(TAG, "mergeWith new " + edit); 6577 } 6578 6579 if (mFrozen) { 6580 return false; 6581 } 6582 6583 switch (mType) { 6584 case TYPE_INSERT: 6585 return mergeInsertWith(edit); 6586 case TYPE_DELETE: 6587 return mergeDeleteWith(edit); 6588 case TYPE_REPLACE: 6589 return mergeReplaceWith(edit); 6590 default: 6591 return false; 6592 } 6593 } 6594 6595 private boolean mergeInsertWith(EditOperation edit) { 6596 if (edit.mType == TYPE_INSERT) { 6597 // Merge insertions that are contiguous even when it's frozen. 6598 if (getNewTextEnd() != edit.mStart) { 6599 return false; 6600 } 6601 mNewText += edit.mNewText; 6602 mNewCursorPos = edit.mNewCursorPos; 6603 mFrozen = edit.mFrozen; 6604 mIsComposition = edit.mIsComposition; 6605 return true; 6606 } 6607 if (mIsComposition && edit.mType == TYPE_REPLACE 6608 && mStart <= edit.mStart && getNewTextEnd() >= edit.getOldTextEnd()) { 6609 // Merge insertion with replace as they can be single insertion. 6610 mNewText = mNewText.substring(0, edit.mStart - mStart) + edit.mNewText 6611 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6612 mNewCursorPos = edit.mNewCursorPos; 6613 mIsComposition = edit.mIsComposition; 6614 return true; 6615 } 6616 return false; 6617 } 6618 6619 // TODO: Support forward delete. 6620 private boolean mergeDeleteWith(EditOperation edit) { 6621 // Only merge continuous deletes. 6622 if (edit.mType != TYPE_DELETE) { 6623 return false; 6624 } 6625 // Only merge deletions that are contiguous. 6626 if (mStart != edit.getOldTextEnd()) { 6627 return false; 6628 } 6629 mStart = edit.mStart; 6630 mOldText = edit.mOldText + mOldText; 6631 mNewCursorPos = edit.mNewCursorPos; 6632 mIsComposition = edit.mIsComposition; 6633 return true; 6634 } 6635 6636 private boolean mergeReplaceWith(EditOperation edit) { 6637 if (edit.mType == TYPE_INSERT && getNewTextEnd() == edit.mStart) { 6638 // Merge with adjacent insert. 6639 mNewText += edit.mNewText; 6640 mNewCursorPos = edit.mNewCursorPos; 6641 return true; 6642 } 6643 if (!mIsComposition) { 6644 return false; 6645 } 6646 if (edit.mType == TYPE_DELETE && mStart <= edit.mStart 6647 && getNewTextEnd() >= edit.getOldTextEnd()) { 6648 // Merge with delete as they can be single operation. 6649 mNewText = mNewText.substring(0, edit.mStart - mStart) 6650 + mNewText.substring(edit.getOldTextEnd() - mStart, mNewText.length()); 6651 if (mNewText.isEmpty()) { 6652 mType = TYPE_DELETE; 6653 } 6654 mNewCursorPos = edit.mNewCursorPos; 6655 mIsComposition = edit.mIsComposition; 6656 return true; 6657 } 6658 if (edit.mType == TYPE_REPLACE && mStart == edit.mStart 6659 && TextUtils.equals(mNewText, edit.mOldText)) { 6660 // Merge with the replace that replaces the same region. 6661 mNewText = edit.mNewText; 6662 mNewCursorPos = edit.mNewCursorPos; 6663 mIsComposition = edit.mIsComposition; 6664 return true; 6665 } 6666 return false; 6667 } 6668 6669 /** 6670 * Forcibly creates a single merged edit operation by simulating the entire text 6671 * contents being replaced. 6672 */ 6673 public void forceMergeWith(EditOperation edit) { 6674 if (DEBUG_UNDO) Log.d(TAG, "forceMerge"); 6675 if (mergeWith(edit)) { 6676 return; 6677 } 6678 Editor editor = getOwnerData(); 6679 6680 // Copy the text of the current field. 6681 // NOTE: Using StringBuilder instead of SpannableStringBuilder would be somewhat faster, 6682 // but would require two parallel implementations of modifyText() because Editable and 6683 // StringBuilder do not share an interface for replace/delete/insert. 6684 Editable editable = (Editable) editor.mTextView.getText(); 6685 Editable originalText = new SpannableStringBuilder(editable.toString()); 6686 6687 // Roll back the last operation. 6688 modifyText(originalText, mStart, getNewTextEnd(), mOldText, mStart, mOldCursorPos); 6689 6690 // Clone the text again and apply the new operation. 6691 Editable finalText = new SpannableStringBuilder(editable.toString()); 6692 modifyText(finalText, edit.mStart, edit.getOldTextEnd(), 6693 edit.mNewText, edit.mStart, edit.mNewCursorPos); 6694 6695 // Convert this operation into a replace operation. 6696 mType = TYPE_REPLACE; 6697 mNewText = finalText.toString(); 6698 mOldText = originalText.toString(); 6699 mStart = 0; 6700 mNewCursorPos = edit.mNewCursorPos; 6701 mIsComposition = edit.mIsComposition; 6702 // mOldCursorPos is unchanged. 6703 } 6704 6705 private static void modifyText(Editable text, int deleteFrom, int deleteTo, 6706 CharSequence newText, int newTextInsertAt, int newCursorPos) { 6707 // Apply the edit if it is still valid. 6708 if (isValidRange(text, deleteFrom, deleteTo) 6709 && newTextInsertAt <= text.length() - (deleteTo - deleteFrom)) { 6710 if (deleteFrom != deleteTo) { 6711 text.delete(deleteFrom, deleteTo); 6712 } 6713 if (newText.length() != 0) { 6714 text.insert(newTextInsertAt, newText); 6715 } 6716 } 6717 // Restore the cursor position. If there wasn't an old cursor (newCursorPos == -1) then 6718 // don't explicitly set it and rely on SpannableStringBuilder to position it. 6719 // TODO: Select all the text that was undone. 6720 if (0 <= newCursorPos && newCursorPos <= text.length()) { 6721 Selection.setSelection(text, newCursorPos); 6722 } 6723 } 6724 6725 private String getTypeString() { 6726 switch (mType) { 6727 case TYPE_INSERT: 6728 return "insert"; 6729 case TYPE_DELETE: 6730 return "delete"; 6731 case TYPE_REPLACE: 6732 return "replace"; 6733 default: 6734 return ""; 6735 } 6736 } 6737 6738 @Override 6739 public String toString() { 6740 return "[mType=" + getTypeString() + ", " 6741 + "mOldText=" + mOldText + ", " 6742 + "mNewText=" + mNewText + ", " 6743 + "mStart=" + mStart + ", " 6744 + "mOldCursorPos=" + mOldCursorPos + ", " 6745 + "mNewCursorPos=" + mNewCursorPos + ", " 6746 + "mFrozen=" + mFrozen + ", " 6747 + "mIsComposition=" + mIsComposition + "]"; 6748 } 6749 6750 public static final Parcelable.ClassLoaderCreator<EditOperation> CREATOR = 6751 new Parcelable.ClassLoaderCreator<EditOperation>() { 6752 @Override 6753 public EditOperation createFromParcel(Parcel in) { 6754 return new EditOperation(in, null); 6755 } 6756 6757 @Override 6758 public EditOperation createFromParcel(Parcel in, ClassLoader loader) { 6759 return new EditOperation(in, loader); 6760 } 6761 6762 @Override 6763 public EditOperation[] newArray(int size) { 6764 return new EditOperation[size]; 6765 } 6766 }; 6767 } 6768 6769 /** 6770 * A helper for enabling and handling "PROCESS_TEXT" menu actions. 6771 * These allow external applications to plug into currently selected text. 6772 */ 6773 static final class ProcessTextIntentActionsHandler { 6774 6775 private final Editor mEditor; 6776 private final TextView mTextView; 6777 private final Context mContext; 6778 private final PackageManager mPackageManager; 6779 private final String mPackageName; 6780 private final SparseArray<Intent> mAccessibilityIntents = new SparseArray<>(); 6781 private final SparseArray<AccessibilityNodeInfo.AccessibilityAction> mAccessibilityActions = 6782 new SparseArray<>(); 6783 private final List<ResolveInfo> mSupportedActivities = new ArrayList<>(); 6784 6785 private ProcessTextIntentActionsHandler(Editor editor) { 6786 mEditor = Preconditions.checkNotNull(editor); 6787 mTextView = Preconditions.checkNotNull(mEditor.mTextView); 6788 mContext = Preconditions.checkNotNull(mTextView.getContext()); 6789 mPackageManager = Preconditions.checkNotNull(mContext.getPackageManager()); 6790 mPackageName = Preconditions.checkNotNull(mContext.getPackageName()); 6791 } 6792 6793 /** 6794 * Adds "PROCESS_TEXT" menu items to the specified menu. 6795 */ 6796 public void onInitializeMenu(Menu menu) { 6797 loadSupportedActivities(); 6798 final int size = mSupportedActivities.size(); 6799 for (int i = 0; i < size; i++) { 6800 final ResolveInfo resolveInfo = mSupportedActivities.get(i); 6801 menu.add(Menu.NONE, Menu.NONE, 6802 Editor.MENU_ITEM_ORDER_PROCESS_TEXT_INTENT_ACTIONS_START + i, 6803 getLabel(resolveInfo)) 6804 .setIntent(createProcessTextIntentForResolveInfo(resolveInfo)) 6805 .setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER); 6806 } 6807 } 6808 6809 /** 6810 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6811 * menu item. 6812 * 6813 * @return True if the action was performed, false otherwise. 6814 */ 6815 public boolean performMenuItemAction(MenuItem item) { 6816 return fireIntent(item.getIntent()); 6817 } 6818 6819 /** 6820 * Initializes and caches "PROCESS_TEXT" accessibility actions. 6821 */ 6822 public void initializeAccessibilityActions() { 6823 mAccessibilityIntents.clear(); 6824 mAccessibilityActions.clear(); 6825 int i = 0; 6826 loadSupportedActivities(); 6827 for (ResolveInfo resolveInfo : mSupportedActivities) { 6828 int actionId = TextView.ACCESSIBILITY_ACTION_PROCESS_TEXT_START_ID + i++; 6829 mAccessibilityActions.put( 6830 actionId, 6831 new AccessibilityNodeInfo.AccessibilityAction( 6832 actionId, getLabel(resolveInfo))); 6833 mAccessibilityIntents.put( 6834 actionId, createProcessTextIntentForResolveInfo(resolveInfo)); 6835 } 6836 } 6837 6838 /** 6839 * Adds "PROCESS_TEXT" accessibility actions to the specified accessibility node info. 6840 * NOTE: This needs a prior call to {@link #initializeAccessibilityActions()} to make the 6841 * latest accessibility actions available for this call. 6842 */ 6843 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo nodeInfo) { 6844 for (int i = 0; i < mAccessibilityActions.size(); i++) { 6845 nodeInfo.addAction(mAccessibilityActions.valueAt(i)); 6846 } 6847 } 6848 6849 /** 6850 * Performs a "PROCESS_TEXT" action if there is one associated with the specified 6851 * accessibility action id. 6852 * 6853 * @return True if the action was performed, false otherwise. 6854 */ 6855 public boolean performAccessibilityAction(int actionId) { 6856 return fireIntent(mAccessibilityIntents.get(actionId)); 6857 } 6858 6859 private boolean fireIntent(Intent intent) { 6860 if (intent != null && Intent.ACTION_PROCESS_TEXT.equals(intent.getAction())) { 6861 String selectedText = mTextView.getSelectedText(); 6862 selectedText = TextUtils.trimToParcelableSize(selectedText); 6863 intent.putExtra(Intent.EXTRA_PROCESS_TEXT, selectedText); 6864 mEditor.mPreserveSelection = true; 6865 mTextView.startActivityForResult(intent, TextView.PROCESS_TEXT_REQUEST_CODE); 6866 return true; 6867 } 6868 return false; 6869 } 6870 6871 private void loadSupportedActivities() { 6872 mSupportedActivities.clear(); 6873 if (!mContext.canStartActivityForResult()) { 6874 return; 6875 } 6876 PackageManager packageManager = mTextView.getContext().getPackageManager(); 6877 List<ResolveInfo> unfiltered = 6878 packageManager.queryIntentActivities(createProcessTextIntent(), 0); 6879 for (ResolveInfo info : unfiltered) { 6880 if (isSupportedActivity(info)) { 6881 mSupportedActivities.add(info); 6882 } 6883 } 6884 } 6885 6886 private boolean isSupportedActivity(ResolveInfo info) { 6887 return mPackageName.equals(info.activityInfo.packageName) 6888 || info.activityInfo.exported 6889 && (info.activityInfo.permission == null 6890 || mContext.checkSelfPermission(info.activityInfo.permission) 6891 == PackageManager.PERMISSION_GRANTED); 6892 } 6893 6894 private Intent createProcessTextIntentForResolveInfo(ResolveInfo info) { 6895 return createProcessTextIntent() 6896 .putExtra(Intent.EXTRA_PROCESS_TEXT_READONLY, !mTextView.isTextEditable()) 6897 .setClassName(info.activityInfo.packageName, info.activityInfo.name); 6898 } 6899 6900 private Intent createProcessTextIntent() { 6901 return new Intent() 6902 .setAction(Intent.ACTION_PROCESS_TEXT) 6903 .setType("text/plain"); 6904 } 6905 6906 private CharSequence getLabel(ResolveInfo resolveInfo) { 6907 return resolveInfo.loadLabel(mPackageManager); 6908 } 6909 } 6910} 6911